Journal
SOLAR RRL
Volume 2, Issue 11, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/solr.201800149
Keywords
electron-transporting layer; perovskite solar cells; platinum doping
Funding
- Natural Science Foundation of China [91733301, 61674109]
- National Key RAMP
- D Program of China [2016YFA0202400]
- Natural Science Foundation of Jiangsu Province [BK20170059]
- Collaborative Innovation Center of Suzhou Nano Science and Technology (Nano-CIC)
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- 111 Project of The State Administration of Foreign Experts Affairs of China
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The electron-transporting layer (ETL) plays a critical role in improving the charge extraction and suppressing the carrier recombination in planar perovskite solar cells (PSCs). Compact titanium dioxide (TiO2) film is a widely used as an ETL in conventional n-i-p PSCs. However, there is still much room for improvement in the electron mobility and reducing the oxygen vacancies of the compact TiO2 film. Herein, Pt-doped TiO2 film with outstanding electron-transporting property and complete coverage on the substrates is reported by the authors. Pt-doping results in a tailed band level of TiO2, which could suppress the charge accumulation at the interface of TiO2-Pt/perovskite. Consequently, TiO2-Pt ETL based PSCs deliver a power conversion efficiency as high as 20.05% with an open-circuit voltage of 1.15 V, a fill factor of 0.75, a short-circuit current density of 23.83 mA cm(-2) and remarkably alleviated hysteresis behavior.
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