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ACS Appl Mater Interfaces. 2017 Apr 19;9(15):13390-13395. doi: 10.1021/acsami.7b00745. Epub 2017 Apr 5.

Aminosilane as a Molecular Linker between the Electron-Transport Layer and Active Layer for Efficient Inverted Polymer Solar Cells.

Fu P1, Guo X1, Wang S1,2, Ye Y1,2, Li C1.

Author information

1
State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences , 457 Zhongshan Road, Dalian 116023, China.
2
Graduate University of Chinese Academy of Sciences , Beijing 100049, China.

Abstract

Interfacial modification is crucial for improving the photovoltaic performance. In this work, we present an aminosilane as a molecular linker between the ZnO electron-transport layer and fullerene derivative phenyl-C71-butyric acid methyl ester (PC71BM)-based active layer for efficient inverted polymer solar cells. An enhancement in the power-conversion efficiency (PCE), from 8.47 to 9.46%, was achieved on using PTB7-Th as donors. The aminosilane molecular linker provides dual functionalities for enhanced PCE, including (1) passivating the ZnO surface and decreasing the surface work function of ZnO for energy-level alignment and (2) bonding onto the fullerene derivative PC71BM-based active layer to reduce the interface contact resistance.

KEYWORDS:

aminosilane; device performance; interfacial modification; inverted polymer solar cells; molecular linker

PMID:
28332393
DOI:
10.1021/acsami.7b00745

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