Journal
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
Volume 10, Issue 8, Pages 592-595Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/pssr.201600037
Keywords
optical spacers; electric fields; hole transport; electron transport; perovskite solar cells
Funding
- National Research Foundation of Korea (NRF) - Korean Government, Ministry of Education, Science and Technology (MEST) [2011-0028729]
- Yonsei University
- National Research Foundation of Korea [2011-0028729] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Lead halide perovskite solar cells with planar heterojunction configuration have recently attracted tremendous attention because of their excellent power conversion efficiencies. The modulation of optical absorption by using an optical spacer layer is a unique method to enhance the device efficiency. Here, we demonstrate the application of thin ZnO layer that act as an optical spacer that enhance the power conversion efficiency perovskite devices from 8.92% to 10.7%, which is mainly due to increment in short-circuit current density by 16% compared to the reference solar cell. The simulation data revealed that ZnO acts as an optical spacer layer that shifts length (average) of electric field vertical bar E vertical bar(2) distribution from 500 nm to 750 nm wavelength is 25 nm in the perovskite layer. Which represents that exciton generation region is moved to near the hole transport layer that enhances the exciton dissociation efficiency and device efficiency. (C) 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
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