Outstanding Performance of Hole-Blocking Layer-Free Perovskite Solar Cell Using Hierarchically Porous Fluorine-Doped Tin Oxide Substrate
Autor: | Haejun Yu, Jong Woo Lee, Jungsup Lee, Kisu Lee, Juyoung Yun, Jaehoon Ryu, Seong Keun Kim, Jyongsik Jang, Doyk Hwang |
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Rok vydání: | 2017 |
Předmět: |
Photocurrent
Materials science Renewable Energy Sustainability and the Environment business.industry Energy conversion efficiency Inorganic chemistry Doping Perovskite solar cell 02 engineering and technology Substrate (electronics) Surface engineering 010402 general chemistry 021001 nanoscience & nanotechnology Tin oxide 01 natural sciences 0104 chemical sciences Optoelectronics General Materials Science 0210 nano-technology business Perovskite (structure) |
Zdroj: | Advanced Energy Materials. 7:1700749 |
ISSN: | 1614-6832 |
Popis: | Perovskite solar cells (PSCs) are of great interest in current photovoltaic research due to their extraordinary power conversion efficiency of ≈20% and boundless potentialities. The high efficiency has been mostly obtained from TiO2-based PSCs, where TiO2 is utilized as a hole-blocking, mesoporous layer. However, trapped charges and the light-induced photocatalytic effect of TiO2 seriously degrade the perovskite and preclude PSCs from being immediately commercialized. Herein, a simplified PSC is successfully fabricated by eliminating the problematic TiO2 layers, using instead a fluorine-doped tin oxide (FTO)/perovskite/hole–conductor/Au design. Simultaneously, the sluggish charge extraction at the FTO/perovskite interface is overcome by modifying the surface of the FTO to a porous structure using electrochemical etching. This surface engineering enables a substantial increase in the photocurrent density and mitigation of the hysteretic behavior of the pristine FTO-based PSC; a remarkable 19.22% efficiency with a low level of hysteresis is obtained. This performance is closely approaching that of conventional PSCs and may facilitate their commercialization due to improved convenience, lower cost, greater stability, and potentially more efficient mass production. |
Databáze: | OpenAIRE |
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