Journal
NANO ENERGY
Volume 15, Issue -, Pages 275-280Publisher
ELSEVIER
DOI: 10.1016/j.nanoen.2015.04.029
Keywords
Organolead trihalide perovskite; Photovoltaic; Hole transport layer; Doping
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Funding
- Sun Shot Program of the US Department of Energy (Energy Efficiency and Renewable Energy) [DE-EE0006709]
- Nebraska Public Power District through the Nebraska Center for Energy Sciences Research
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We demonstrated the efficiency of a solution-processed planar heterojunction organometallic trihalide perovskite solar cell can be increased to 17.5% through doping the hole transporting layer for reducing the resistivity. Doped Poly(triaryl amine) (PTAA) by 2,3,5,6-Tetrafluoro7,7,8,8-Tetracyanoquinodimethane (F4-TCNQ) reduced device series resistance by three-folds, increasing the device fill factor to 74%, open circuit voltage to 1.09 V without sacrificing the short circuit current. This study reveals that the high resistivity of currently broadly applied polymer hole transport layer limits the device efficiency, and points a new direction to improve the device efficiency. (C) 2015 Elsevier Ltd. All rights reserved.
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