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Efficient Solution‐Processed Small‐Molecule Solar Cells with Inverted Structure
Author(s) -
Kyaw Aung Ko Ko,
Wang Dong Hwan,
Gupta Vinay,
Zhang Jie,
Chand Suresh,
Bazan Guillermo C.,
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.201300295
Subject(s) - materials science , work function , energy conversion efficiency , cathode , layer (electronics) , molecule , optoelectronics , solar cell , small molecule , chemical physics , nanotechnology , chemistry , organic chemistry , genetics , physics , biology
We successfully demonstrate inverted structure small‐molecule (SM) solar cells with an efficiency of 7.88% using ZnO and PEIE as an interfacial layer. Modification of ZnO with a cost‐effective PEIE thin layer increases the efficiency of the inverted cell as a result of reducing the work function of the cathode and suppressing the trap‐assisted recombination. In addition to the high efficiency, the inverted SM solar cells are relatively stable in air compared to conventional cells.