南方科技大学化学系何凤

wawa

何凤，南方科技大学副教授。2002年毕业于吉林大学化学学院并获得工学学士学位，同年保送吉林大学高分子化学与物理专业攻读博士学位，师从马於光教授和沈家骢院士，并于2007年获得哲学博士学位。同年加入加拿大多伦多大学Mitchell A. Winnik教授研究小组，从事具有荧光特性的嵌段共聚物的阴离子聚合以及其可控活性自组装行为的研究。2009年前往美国芝加哥大学Luping Yu教授实验室从事高分子材料方向研究。2012年加入全球主要的受体材料制造商之一Nano-C, Inc.公司工作，作为高级研究员主管与默克集团（Merck KGaA）的合作研究，致力于发展高性能的富勒烯衍生物材料体系。2013年加入美国Polyera Corp.公司，作为高级研究员进行高效率聚合物给体材料的研发工作。2012年9月作为有机光电子材料领域优秀青年科研工作者（GSAS学者），受美国自然科学基金（NSF）邀请参加了在台湾大学举办的有机太阳能全球高级研讨会。2014年8月受聘为南方科技大学化学系副教授。至今在Chem. Rev.、J. Am. Chem. Soc.、Adv. Mater. 以及Angew. Chem. Int. Edit.等国际顶尖专业杂志上已发表论文40篇，总引用次数超过1000次，h-指数17。

何凤

副教授

化学系

0755-88018398

hef@sustc.edu.cn

研究方向

有机光电功能材料等

   

工作经历

2014 年 8 月起，副教授，化学系，南方科技大学
2013-2014，高级研究员，美国 Polyera 公司
2012-2013，高级研究员，美国 Nano-C 公司
2009-2012，博士后，化学系，美国芝加哥大学
2008 年 7-10 月，访问学者，化学学院，英国布里斯托尔大学
2007-2009，博士后，化学系，加拿大多伦多大学

教育背景
09.1998-07.2002，本科 吉林大学 化学学院 高分子材料与工程
09.2002-06.2007，博士 吉林大学 化学学院 高分子化学与物理

2006年， 受邀参加德国林岛诺贝尔奖得主大会  中德科学中心、林岛诺贝尔奖得主大会基金会
2012年， GSAS学者美国自然科学基金会
2014年，深圳市海外高层次人才“孔雀计划” 入选者  深圳市政府
2015年，中组部第六批“ 青年##计划” 入选者  中组部

Publications at SUSTech:

1.      Hui Chen,Zhiming Hu, Huan Wang, Longzhu Liu, Pengjie Chao, Jianfei Qu, Anhua Liu, WeiChen, Feng He*, “A Chlorinated π-Conjugated Polymer Donor for Efficiency Organic Solar Cells”, Joule, 2018,Accepted.

2.      Lang Han,Meijing Wang, Xiangmeng Jia, Wei Chen, Hujun Qian and Feng He*, “Uniformtwo-dimensional square assemblies from conjugated block copolymers driven by π–πinteractions with controllable sizes”, Nat.Commun.,2018, 9, 865-876.

3.      PengjieChao, Zhao Mu, Huan Wang, Daize Mo, Hui Chen, Hong Meng, Wei Chen* and FengHe*, “Effect of the Molecular Configuration of Perylene Diimide Acceptorson Charge Transfer and Device Performance”, ACS Appl.Energy Mater., 2018, ASAP.

4.      Yuan Zhao,Huan Wang, Weixuan Zeng, Shengpeng Xia, Feng Zhou, Hui Chen, Feng He*and Chuluo Yang*, “Regulating the optoelectronic properties of small molecule donorswith multiple alternative electron-donor and acceptor units for organic solarcells”, J. Mater. Chem. A, 2018, 6, 8101-8108.

5.      Yuan Zhao,Huan Wang, Shengpeng Xia, Feng Zhou, Zhenghui Luo, Jiajia Luo, Feng He*and Chuluo Yang*, “9,9’-Bifluorenylidene-Core Perylene Diimide Acceptors for As-CastNon-Fullerene Organic Solar Cells: The Isomeric Effect on OptoelectronicProperties”, Chem. Eur. J., 2018, 24,1-9.

6.      JianfeiQu, Zhao Mu, Hanjian Lai, Mo Xie, Longzhu Liu, Wei Lu, Wei Chen* and FengHe*, “Effect of the Molecular Configuration of Perylene Diimide Acceptorson Charge Transfer and Device Performance”, ACS Appl.Energy Mater.,2018, 1 (2), 833-840.

7.      PengjieChao, Huan Wang, Daize Mo, Hong Meng, Wei Chen* and Feng He*, “SynergisticEffects of Chlorination and A Fully Two-Dimensional Side-Chain Design onMolecular Energy Level Modulation toward Non-Fullerene Photovoltaics”, J.Mater. Chem. A, 2018, 6, 2942-2951.

8.      Huan Wang,Pengjie Chao, Hui Chen, Zhu Mu, Wei Chen*and Feng He* “SimultaneousIncrease in Open-Circuit Voltage and Efficiency of Fullerene-Free Solar Cellsthrough Chlorinated Thieno[3,4‑b]thiophene Polymer Donor”, ACSEnergy Lett., 2017, 2, 1971-1977.

9.      PengjieChao, Huan Wang, Shiwei Qu, Daize Mo, Hong Meng, Wei Chen* and Feng He*,“From Semi- to Full-Two-Dimensional Conjugated Side-Chain Design: AWay toward Comprehensive Solar Energy Absorption”,Macromolecules, 2017,50, 9617-9625.

10.  Zhen Yang, Hui Chen, Huan Wang,Daize Mo, Longzhu Liu, Pengjie Chao, Yulin Zhu, Chuanjun Liu, Wei Chen*and Feng He*, “The integrated adjustment of chlorine substitution andtwo-dimensional side chain of low band gap polymers in organic solar cells”, Polym.Chem., 2018, 9, 940-947.

11.  Daize Mo, Huan Wang, Hui Chen,Shiwei Qu, Pengjie Chao, Zhen Yang, Leilei Tian, Yu-An Su, Yu Gao, Bing Yang,Wei Chen*, Feng He* “Chlorination of low band-gap Polymers: towards high performancepolymer solar cells”, Chem. Mater.,2017, 29, 2819–2830.

12.  Shiwei Qu, Huan Wang, Daize Mo,Pengjie Chao, Zhen Yang, Longji Li, Leilei Tian, Wei Chen* and Feng He*, “Fine Tuningof Open-Circuit Voltage by Chlorination in Thieno[3,4‑b]thiophene− Benzodithiophene Terpolymers toward Enhanced Solar EnergyConversion”, Macromolecules, 2017, 50, 4962-4971.

13.  Zhiming Hu, Hui Chen, Jianfei Qu,Xiaowei Zhong, Pengjie Chao, Mo Xie, Wei Lu, Anhua Liu*, LeileiTian, Yu-An Su, Wei Chen*, Feng He* “Design andSynthesis of Chlorinated Benzothiadiazole-Based Polymers for Efficient SolarEnergy Conversion”, ACS Energy Lett., 2017, 2, 753-758.

14.  Hui Chen, Pengjie Chao, DengbaoHan, Huan Wang, Jingsheng Miao, Haizheng Zhong*, Hong Meng, Feng He*“Hydroxyl-terminated CuInS2-based quantum dots: potential cathodeinterfacial modifiers for efficient inverted polymer solar cells”, ACSAppl. Mater. & Inter., 2017, 9 (8), 7362–7367.

15.  Yuan Zhao, Zhou Xu, Kailong Wu,Huan Wang, Shiwei Qu, Feng He*, Chuluo Yang*, “Diketopyrrolopyrrolebased A(2)-D-A(1)-D-A(2) type small molecules for organic solar cells: Effectsof substitution of benzene with thiophene”，Dyes andPigments, 2016, 130, 282-290.

16.  Yuan Zhao, Zhou Xu, Kailong Wu,Huan Wang, Shiwei Qu, Feng He*, Chuluo Yang*, “Influence ofthe positions of thiophenes and side chains on diketopyrrolopyrrole basednarrow band-gap small molecules for organic solar cells”,Dyes andPigments, 2016, 130, 100-108.

Publications Prior to SUSTech:

17.  Feng He, Wei Wang,Wei Chen, Tao Xu, Seth B. Darling, Joseph Strzalka, Yun Liu, Luping Yu*, “Tetrathienoanthracene-basedcopolymers for efficient solar cells” J. Am.Chem. Soc. 2011, 133, 3284-3287.

18.  Feng He, Torben Gädt,Ian Manners*, Mitch A. Winnik*, “Fluorescent “barcode” multiblock co-micelles via the living self-assembly of di- andtriblock copolymers with a crystalline core-forming metalloblck” J.Am. Chem. Soc. 2011,133, 9095-9103.

19.  Feng He, Luping Yu*, “How far canpolymer solar cells go?-in need of a synergistic approach” J.Phys. Chem. Lett.2011,3102-3113.

20.  Bridget Carsten, Feng He,Hae J. Son, Tao Xu, Luping Yu*, “Stille polycondensation for synthesis of functional materials” Chem.Rev. 2011, 111, 1493-1528.

21.  Feng He, Torben Gädt,Marcus Jones, Gregory D. Scholes, Ian Manners*, Mitch A. Winnik*, “Synthesis ofpoly(ferrocenyldimethylsilane-b-2-vinylpyridine-b-2,5-di(2'-ethylhexyloxy)-1,4-phenylvinylene)and self-assembly to form fluorescent micelles” Macromolecules 2009, 42,7953–7960.

22.  Feng He, YinhuaZhou, Shuijun Liu, Leilei Tian, Hai Xu, Houyu Zhang, Bing Yang, Qingfang Dong,Wenjing Tian, Yuguang Ma*, Jiacong Shen, “Cruciformoligo(phenylenevinylene) with a bipyridine bridge: synthesis, its rhenium(I)complex and photovoltaic properties” Chem.Commun. 2008, 3912–3914.

23.  Feng He, Leilei Tian,Weijie Xie, Mao Li, Qi Gao, Muddasir Hanif, Yingfang Zhang, Cheng Gang, BingYang, Yuguang Ma,* Shiyong Liu, Jiacong Shen, “Highly efficientblue organic light-emitting devices based on improved guest/host combination” J.Phys. Chem. C 2008, 112, 12024–12029.

24.  Feng He, LeileiTian, Hai Xu, Xiaoyu Tian, Weijie Xie, Muddasir Hanif, JialiangXia, Fengzhong Shen, Bing Yang, Feng Li,Yuguang Ma,* Yanqiang Yang*, Jiacong Shen, “Diphenylaminesubstituted cruciform oligo(phenylenevinylene): enhanced one-photon andtwo-photon excited fluorescence in solid-state” Adv. Funct.Mater. 2007, 17, 1551–1557.

25.  Feng He, Hai Xu, BingYang, Yu Duan, Leilei Tian, Keke Huang, Yuguang Ma,* Shiyong Liu, Shouhua Feng,Jiacong Shen, “Oligomeric phenylenevinylene with cross dipole arrangement andamorphous morphology: enhanced solid-state luminescence efficiency andelectroluminescence performance” Adv. Mater. 2005, 17, 2710–2714.

26.  Feng He, Hong Xia,Shi Tang, Yu Duan, Ming Zeng, Linlin Liu, Mao Li, Haiquan Zhang, Bing Yang,Yuguang Ma,* Shiyong Liu, Jiacong Shen, “A novel amorphousoligo(phenylenevinylene) dimer with a biphenyl linkage center and fluorene endgroups for electroluminescent devices” J. Mater.Chem. 2004, 14, 2735–2740.

27.  Feng He, Gang Cheng,HaiquanZhang,Yan Zheng,Zengqi Xie,Bing Yang,YuguangMa,*Shiyong Liu, Jiacong Shen, “Synthesis,characteristics and luminescence properties of oligo(phenylenevinylene) dimerswith a biphenyl linkage center” Chem. Commun. 2003, 2206–2207.

28.  Feng He, HaiquanZhang, Lin He,Yan Zheng, Guo Zhang,Yuguang Ma*,Jiacong Shen,“Twisted PPV copolymers with efficient blue light emitting” Synth.Met. 2003, 135–136, 209–210.

29.  Shanfeng Xue, SuijunLiu, Feng He, Liang Yao, Cheng Gu, Hai Xu, Zengqi Xie, Hongbin Wuand Yuguang Ma*,“Chemistry and Material based on 5,5'-bibenzo[c][1,2,5]thiadiazole” Chem.Commun. 2013, ASAP.

30.  Haythem A. Saadeh, LuyaoLu, Feng He, Joseph E. Bullock, Wei Wang, Bridget Carsten, LupingYu*, “Polyselenopheno[3,4‐b]selenophene for Highly Efficient Bulk Heterojunction Solar Cells” ACSMacro lett. 2012, 1, 400–403.

31.  Mayank Mayukh, In HwanJung, Feng He, Luping Yu* “rementaloptimization in donor polymers for bulk heterojunction organic solar cellsexhibiting high performance” J. Polym. Sci. Part B: Polym. Phys., 2012, 50,1057–1070.

32.  Bridget Carsten, Jodi M. Szarko,Luyao Lu, Hae Jung Son, Feng He, Sylvia J. Lou, Lin X. Chen*,LupingYu*, “Examining the Effect of the Dipole Moment on Charge Separation inDonor–Acceptor Polymers for Organic Photovoltaic Applications” Macromolecules 2012,45, 6390–6395.

33.  Bridget Carsten, Jodi M. Szarko,Hae Jung Son, Wei Wang, Luyao Lu, Feng He, Brian S. Rolczynski,Sylvia J. Lou, Lin X. Chen*,Luping Yu*, “Examiningthe Effect of the Dipole Moment on Charge Separation in Donor–AcceptorPolymers for Organic Photovoltaic Applications” J. Am.Chem. Soc. 2011, 5, 8248–8257.

34.  Hae J. Son, Feng He,Bridget Carsten, Luping Yu*, “Are We There Yet?-Design of Better Conjugated Polymers for PolymerSolar Cells” J. Mater. Chem. 2011,21,18934-18945.

35.  Wei Chen,* Tao Xu, FengHe, Wei Wang, Cheng Wang, Joseph Strzalka, Yun Liu, Jianguo Wen, Dean J.Miller, Jihua Chen, Kunlun Hong, Luping Yu,*, and Seth B. Darling*"Hierarchical Nanomorphologies Promote Exciton Dissociation inPolymer/Fullerene Bulk Heterojunction Solar Cells" Nano Letters 2011, 11,3707–3713.

36.  Shumin Yang, Dan Lu, LeileiTian, Feng He, Geng Chen, Fangzhong Shen, Hong Xu, Yuguang Ma*, “Stablewater-dispersed organic nanoparticles: preparation, optical properties, andcell imaging application” Nanoscale, 2011 3, 2261-2267.

37.  Jodi M. Szarko, Brian S.Rolczynski, Jianchang Guo, Yongye Liang, Feng He, Michael W. Mara,Luping Yu, Lin X. Chen*,“Electronic Processes in Conjugated Diblock Oligomers Mimicking LowBand-Gap Polymers: Experimental and Theoretical Spectral Analysis” J.Phys. Chem. B 2010, 114, 14505-14513.

38.  Xu Hong, Yang Shu-Min, Chen Geng,Leilei Tian, Feng He, Guangyi Wang, Yuguang Ma*, “OrganicTwo-photon Fluorescence Nanoparticles for Cell Stains” Chem.J Chinese U., 2010, 31, 632-634.

39.  Hai Xu, Feng He, BingYang, Hongyu Zhang, Shiyong Liu, Xing Gu, Dandan Liu, Xiaodong Liu, JingshenYu, Yuguang Ma*, “Ground, Excited Structures and Photoelectronic Properties ofPoly(p-phenylenevinylene) Oligomers with Biphenyl Bridge” ActaPhys.-Chim. Sin. 2009, 25, 869-875.

40.  Liu Suijun, Feng He,Huan Wang, Hai Xu, Chunyu Wang, Feng Li*, Yuguang Ma*, “CruciformDPVBi: synthesis, morphology, optical and electroluminescent properties” J.Mater. Chem. 2008, 18, 4802–4807.

41.  Fangfang Wang, Feng He,Zengqi Xie, Mao Li, Muddasir Hanif, Xing Gu, Bing Yang, Hongyu Zhang, Ping Lu,Yuguang Ma*, “A solution-processible poly(p-phenylene vinylene) without alkylsubstitution: Introducing the cis-vinylene segments in polymer chain forimproved solubility, blue emission, and high efficiency” J.Polym. Sci. Pol. Chem. 2008,46, 5242–5250.

42.  Fangfang Wang, Feng He,Zengqi Xie, Yupeng Li, Muddasir Hanif, Mao Li, Yuguang Ma*, “Poly(p-phenylenevinylene) derivatives with different contents of cis-olefins and their effecton the optical properties” Macromol. Chem. Phys.2008, 209, 1381–1388.

43.  Yu Duan, Feng He,Ping Chen, Yi Zhao, Shiyong Liu*, Yuguang Ma*, “Small-molecularwhite organic light-emitting devices employing 2, 5, 2 ', 5 '-tetra(p-trifluoromethylstyryl)-biphenyl as single-emitting component” Opt.Quantum Electron, 2008, 40, 57–63.

44.  Leilei Tian, Feng He,Houyu Zhang, Hai Xu, Bing Yang, Chunyu Wang, Ping Lu, Fei Li, Yuguang Ma*,Jiacong Shen, “Thermal cycloaddition facilitated by orthogonal π-π organizationthrough conformational transfer in a swivel-cruciform oligo(phenylenevinylene)”, Angew.Chem. Int. Ed. 2007, 46, 3245–3248.

45.  Yingfang Zhang, Feng He,Gang Cheng, Chunyan Ruan, Yuanyuan Lin, Yi Zhao, Yuguang Ma*, Shiyong Liu*, “Blue andwhite organic light-emitting devices using oligo(phenylenvinylene) as a blueemitter” Semicond. Sci. Tech. 2007,22,214–217.

46.  Yupeng Li, Fangzhong Shen, HuanWang, Feng He, Zengqi Xie, Houyu Zhang, Zhiming Wang, Linlin Liu,Feng Li*, Muddasir Hanif, Ling Ye, Yuguang Ma*, “SupramolecularNetwork Conducting the Formation of Uniaxially Oriented Molecular Crystal ofCyano Substituted Oligo(p-phenylene vinylene) and Its Amplified SpontaneousEmission (ASE) Behavior” Chem. Mater. 2008,20, 7312–7318.

47.  Yupeng Li, Hai Xu, LiyongWu, Feng He, Fangzhong Shen, Linlin Liu, Bing Yang, Yuguang Ma*, “NMR signalassignment of segments in MEH-CN-PPV cis/trans-conformational segments in MEH-CN-PPV” J.Polym. Sci. Pt. B-Polym. Phys. 2008, 46, 1105–1113.

48.  Bing Yang, Zengqi Xie, HouyuZhang, Hai Xu, Muddasir Hanif, Xing Gu, Feng He, Jingsheng Yu,Yuguang Ma*, Jiacong Shen, Xiaodong Liu, Jikang Feng, “Theoreticalstudy of 2,5-diphenyl-1,4-distyrylbenzene (a model compound of PPV): Acomparison of the electronic structure and photophysical properties of cis- andtrans-isomers” Chem. Phys. Chem.2008, 345, 23–31.

49.  Fangzhong Shen, Feng He,Dan Lu, Zengqi Xie, Weijie Xie, Yuguang Ma*, Bin Hu, “Bright andcolour stable white polymer light-emitting diodes” Semicond.Sci. Tech. 2006, 21, L16–L19.

50.  Yu Duan*, Yi Zhao, Ping Cheng,Jiang Li, Shiyong Liu, Feng He, Yuguang Ma*, “High-performanceblue electroluminescence devices based on distyrylbenzene derivatives” Appl.Phys. Lett. 2006, 88, 263503.

51.  Yingfang Zhang, Gang Cheng,Shufeng Chen, Yan Li, Yi Zhao, Shiyong Liu*, Feng He, Leilei Tian,Yuguang Ma*, “Efficient blue organic light-emitting devices based onoligophenylenevinylene” Appl. Phys. Lett. 2006, 88,263508.

52.  Hai Xu, Bing Yang, FengHe, Zengqi Xie, Leilei Tian, Xiaodong Liu, Jingshen Yu, Yuguang Ma*, “Theoreticalstudies on ground state structure, electronic energy level and absorptionspectra of PPV oligomers with biphenyl bridge” Chem. JChinese U., 2006, 27, 510–514.

53.  Yu Duan, Feng He,Gang Chen, Jiang Li, Yuguang Ma, Shiyong Liu*, “Blueelectroluminescent devices based on a trimeric phenylenvinylene derivative asemitting layer’’ Thin Solid Films 2005, 492, 275–278.

54.  Zengqi Xie, Bing Yang, GangCheng, Linlin Liu, Feng He, Fangzhong Shen, Yuguang Ma*, ShiyongLiu, “Supramolecular interactions induced fluorescence in crystal:anomalous emission of 2,5-diphenyl-1,4-distyrylbenzene with all cis doublebonds” Chem. Mater. 2005,17, 1287–1289.

55.  Gang Cheng, Feng He,Yi Zhao, Yu Duan, Haiquan Zhang, Bing Yang, Yuguang Ma*, Shiyong Liu, “Highlyefficient blue organic light-emitting devices using oligo(phenylenevinylene)dimers as an emitting layer” Semicond. Sci. Tech.2004,19, 78–80.

56.  Gang Cheng, Yi Zhao, YingfangZhang, Shiyong Liu*, Feng He, Haiquan Zhang, Yuguang Ma*, “Whiteorganic light-emitting devices using 2,5,2',5'-tetrakis(4'-biphenylenevinyl)-biphenyl as blue light-emitting layer” Appl. Phys.Lett.2004, 84, 4457–4459.

ditelv

 南方科技大学何凤副教授团队和北京大学赵达慧教授团队：氯取代助力三元全聚合物太阳电池效率提升至9.03%

与传统的聚合物太阳能电池(PSCs)相比，全聚合物太阳能电池(all-PSCs)具有成本低、机械性能高和形貌稳定等优点。近年来，全聚合物太阳能的光电转换效率(PCE)得到极大提升，最高的PCE记录由二元全聚合物太阳能电池实现，达到10%。然而，二元全聚合物太阳能电池混合活化层的光吸收范围较窄，限制了器件性能的进一步提升。而三元聚合物太阳能电池在光吸收和载流子转移方面优于二元全聚合物太阳能电池，具有获得更高PCE的潜力。而且与传统的叠层太阳能电池相比，三元聚合物太阳能电池的制备过程更为简单。

  南方科技大学的何凤副教授研究团队和北京大学的赵达慧教授研究团队利用PTB7-Th和氯取代的PBClT聚合物为共给体，NDP-V-C7为聚合物受体，制备了高效的三元全聚合物太阳电池。首先，PBClT和PTB7-Th具有相似的化学结构，PBClT中氯原子的引入微调了其能级排布，使两个给体聚合物之间出现能级差，并有利于形成级联能级，促进电荷的传输。其次，PBClT聚合物具有更深的HOMO能级，和NDP-V-C7制备的全聚合物太阳电池具有更高的开路电压（Voc）。

Fig. 1 (a) Chemical structures of PTB7-Th, PBClT and NDP-V-C7. (b) Normalized UV-Vis absorptions of PTB7-Th, PBClT and NDP-V-C7 films. (c)The molecular energy levels of PTB7-Th, PBClT and NDP-V-C7.

  因此，通过调整三元共混器件中PBClT的含量，可实现全聚合物太阳电池开路电压的精确调控，提高器件效率。最后，得益于PBClT和PTB7-Th的结构相似性，PBClT的引入能够进一步优化混合薄膜的形貌。通过器件优化，三元全聚合物太阳电池的光电转换效率达到了9.03%！

  论文链接：https://doi.org/10.1007/s11426-018-9371-0

huanping

南方科技大学化学系大四本科生钟筱蔚作为第一作者在聚合物领域知名期刊Macromolecules（《大分子》）上发表关于氯取代给体聚合物太阳能电池材料的最新研究成果，论文题为“Synergistic Effect of Chlorination and Selenophene: Achieving Elevated Solar Conversion in Highly Aggregated Systems”。化学系副教授何凤为本文通讯作者。

有机太阳电池因其成本低、质量轻、有大面积溶液加工前景等优点，受到国际范围的广泛关注。通过优化分子结构来提升器件性能是许多学者的研究方向。

图1. 给体PBT3TClSe 与 受体 PC71BM(富勒烯衍生物)

何凤课题组经过过去多年的不断努力，坚持通过精准控制分子弱相互作用调控材料结构形貌和性能的研究思路，分别通过氯原子的Cl-S、Cl-π等超分子相互作用调控有机光电材料分子的排列方式，构筑更加适合有机太阳电池器件的材料体系；同时利用共轭聚合物的π-π相互作用作为驱动力控制材料在不同维度上的生长速度，成功制备了二维方块胶束，并积极探索这些二维材料的电学行为响应。氯原子卤键等非共价相互作用对控制有机分子的排列和形貌具有决定性作用，不但可获得高度有序的材料体系，同时相应材料性能也可得到大幅提高，例如和本研究相关的氯取代给体聚合物效率就曾达到了富勒烯类太阳电池的世界一流水平，而且器件稳定性也得到了极大改善，引领了有机太阳电池领域对氯取代的重视和广泛研究。

谈到这项研究和取得的成果，钟筱蔚表示，实验和投稿过程中的所有曲折经历都让她觉得弥足珍贵，而这些经验将会助力她未来出国进修。她感谢南科大化学系的科研创新项目，让当时大三的她和其他同学有机会在老师们的帮助下相对独立地完成自己选择的研究目标。

该项研究得到国家自然基金委、深圳市科创委基础研究学科布局项目、南科大启动经费与深圳格拉布斯研究院经费的支持。美国阿贡国家实验室陈伟教授提供了同步辐射测试合作。

mitao

2019自然科学基金面上项目-二维微纳半导体共聚物材料的可控自组装制备及器件性能研究
批准号        21975115        学科分类        光电磁功能分子 ( B050205 )
项目负责人        何凤        负责人职称                依托单位        南方科技大学
资助金额        65.00万元        项目类别        面上项目        研究期限        2019 年 09 月 09 日 至2019 年 09 月 09 日

cuihuo

近日，南方科技大学何凤教授课题组以共轭嵌段聚合物为构筑单元，利用其分子之间π-π弱相互作用驱动组装体的生长，通过简易的一步溶剂过程实现了稳定的，形貌特殊的复杂多级组装体。

在本研究中，作者以共轭聚合物PPV为成核嵌段设计合成了两亲性嵌段共聚物PPV-b-P2VP，后以此为构筑单元，使其在选择性溶剂中进行“溶解-降温-陈化”这一简单过程，并通过调节共聚物嵌段长度比和选择性溶剂极性，实现了对所得组装体维度上和形貌上的精细调控，除了得到密集的一维线状胶束，更重要的是调控得到了具有“围巾”状这一特殊形貌的复杂组装体，该形貌由中间二维片状部分和两端线形“流苏”组成。通过电镜追踪生长过程，可以直观观察到由一维到二维再生长出“流苏”的生长过程。利用PPV嵌段良好的光学特性，对组装过程进行了紫外追踪表征，结合高分辨透射电子显微镜照片、选区电子衍射（SAED）和掠入射广角X射线散射（GIWAXS）分析，可以确定对于胶束的形成，PPV嵌段间的弱π-π相互作用为主要驱动力。
本项研究对于弱相互作用体系中复杂多级结构的构筑提供了有价值的参考，拓展了组装体形貌多样性，并且展现出其功能化应用的探索价值。相关论文“Formation of hierarchical architectures with dimensional and morphological control in the self-assembly of conjugated block copolymer”发表在Small Methods (DOI: 10.1002/smtd.201900470)上。