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High‐Efficiency Polymer Solar Cells Enhanced by Solvent Treatment
Author(s) -
Zhou Huiqiong,
Zhang Yuan,
Seifter Jason,
Collins Samuel D.,
Luo Chan,
Bazan Guillermo C.,
Nguyen ThucQuyen,
Heeger Alan J.
Publication year - 2013
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201204306
Subject(s) - materials science , thiophene , open circuit voltage , methanol , charge (physics) , voltage , optoelectronics , organic chemistry , electrical engineering , chemistry , physics , particle physics , engineering
A significant enhancement of efficiency in thieno[3,4‐b]‐thiophene/benzodithiophene:[6,6]‐phenyl C71‐butyric acid methyl ester (PTB7:PC 70 BM) solar cells can be achieved by methanol treatment. The effects of methanol treatment are shown in an improvement of built‐in voltage, a decrease in series resistance, an enhanced charge‐transport property, an accelerated and enlarged charge extraction, and a reduced charge recombination, which induce a simultaneous enhancement in open‐circuit voltage ( V oc ), short‐circuit current ( J sc ), and fill factor (FF) in the devices.