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Phosphate ester side‐chain‐modified conjugated polymer for hybrid solar cells
Author(s) -
Zhang Zhongqiang,
Jin Zhengneng,
Fu Weifei,
Shi Minmin,
Chen Hongzheng
Publication year - 2017
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.45003
Subject(s) - materials science , alkyl , conjugated system , polymer , side chain , nanocrystal , energy conversion efficiency , chemical engineering , hybrid solar cell , polymer chemistry , polymer solar cell , hybrid material , band gap , nanotechnology , organic chemistry , chemistry , optoelectronics , composite material , engineering
Although nanocrystals have several advantages of tunable bandgap and high carrier mobility, it is still challenging to achieve high‐performance polymer: nanocrystals hybrid solar cells (HSC) due to the complicated surface problem. Many efforts have been devoted to replace the long alkyl chain on the surface of nanocrystals to improve the charge transfer and transport. Herein, we modified the alkyl chain in poly[2,6–(4,4‐ bis (2‐ethylhexyl)−4H‐cyclopenta[2,1‐b;3,4‐b′]‐dithiophene)‐ alt ‐4,7–(2,1,3‐benzothiadiazole)] (PCPDTBT) by phosphate ester. Due to its strong affinity to CdSe nanocrystals, the resulting polymers can spontaneously exchange the long chain ligands in one‐step process. With the improved morphology of polymer: CdSe blended film, a power conversion efficiency (PCE) of 3.12% was achieved for hybrid solar cells. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 45003.