Bulk intermixing-type perovskite CH₃NH₃PbI₃/TiO₂ nanorod hybrid solar cells

To replace high-temperature sintered scaffold materials in conventional CH3NH3PbI3-based solar cells, this study demonstrates a new device structure of a bulk intermixing (BI)-type CH3NH3PbI3/TiO2 nanorod (NR) hybrid solar cell, where dispersed TiO2 NRs from chemical synthesis are intermixed with th...

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Bibliographic Details
Published in:Nanoscale 2015-09, Vol.7 (34), p.14532-14537
Main Authors: Li, Shao-Sian, Wang, Ying-Chiao, Tsai, Chin-Ming, Wen, Cheng-Yen, Yu, Chia-Hao, Yang, Yu-Pei, Lin, Jou-Chun, Wang, Di-Yan, Chen, Chia-Chun, Yeh, Yun-Chieh, Chen, Chun-Wei
Format: Article
Language:English
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Summary:To replace high-temperature sintered scaffold materials in conventional CH3NH3PbI3-based solar cells, this study demonstrates a new device structure of a bulk intermixing (BI)-type CH3NH3PbI3/TiO2 nanorod (NR) hybrid solar cell, where dispersed TiO2 NRs from chemical synthesis are intermixed with the perovskite absorbing layer to form a BI-type perovskite/TiO2 NR hybrid for device fabrication. Through interface engineering between the TiO2 NR surface and the photoactive perovskite material of CH3NH3PbI3 by ligand exchange treatment, a remarkable power conversion efficiency (PCE) of over 12% was achieved based on the simple BI-type CH3NH3PbI3/TiO2 NR hybrid device structure. The proposed hybrids not only provide great flexibility for deposition on various substrates through spin coating at low temperatures but also enable layer-by-layer deposition for the future development of perovskite-based multi-junction solar cells.
ISSN:2040-3372
DOI:10.1039/c5nr04076k