1. Efficient and stable planar perovskite solar cells with a non-hygroscopic small molecule oxidant doped hole transport layer.
- Author
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Huang, Like, Hu, Ziyang, Xu, Jie, Zhang, Ke, Zhang, Jianjun, Zhang, Jing, and Zhu, Yuejin
- Subjects
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SOLAR cells , *PEROVSKITE , *SMALL molecules , *OXIDIZING agents , *HETEROJUNCTIONS , *TETRACYANOQUINODIMETHANE , *ELECTRIC conductivity - Abstract
We report planar heterojunction perovskite solar cells with tetrafluoro-tetracyanoquinodimet-hane (F4-TCNQ) doped spiro-MeOTAD by solvent treatment as hole transport layer. The non-hygroscopic F4-TCNQ doped spiro-MeOTAD plays the same role as Li-bis (trifluoromethanesulfonyl) imide doped spiro-MeOTAD in perovskite solar cells, endowing the device both high efficiency and good stability. The F4-TCNQ dopant was optimized to enhance the conductivity and adjust the highest occupied molecular orbital of spiro-OMeTAD to match the valence band maximum of perovskite for efficient hole extraction, which results in a high fill factor, open circuit voltage and short current density, simultaneously. Device including the F4-TCNQ doped spiro-MeOTAD exhibits a power conversion efficiency of 10.59%, which is a 160% improvement relative to that of the control device with the pristine spiro-MeOTAD as hole transport layer. Time-dependent solar cell performance measurements revealed significantly improved air stability for perovskite solar cells with the F4-TCNQ doped spiro-MeOTAD hole transport layer. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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