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Flexible Perovskite Solar Cells with Enhanced Performance Based on a Void-Free Imbedded Interface via a Thin Layer of Mesoporous TiO2
journal contribution
posted on 2022-02-13, 17:03 authored by Liangxue Gu, Haiyan Li, Shuiping Gong, Xinyu Chen, Feng Wen, Songwang YangThe
interfacial contacts between the electron transport layer (ETL)
and the perovskite film play a crucial role in high-performance perovskite
solar cells (PSCs). Herein, we propose a method for depositing a low-temperature-processed
mesoporous TiO2 (mp-TiO2) layer on the SnO2 ETL (bl-SnO2) with the flexible substrate to enhance
the performance of the PSCs. This kind of mesoporous TiO2 layer can both improve the interfacial contact without voids in
the imbedded interface and enhance the mechanical stability in the
interface between TiO2 and perovskite. The upward growth
of perovskite grains on the mesoporous TiO2 layer leads
to a uniform grain size and prevents voids at the ETL/perovskite interface.
This excellent interfacial contact is the foundation for the collection
and transportation of photogenerated electrons. As a result, the efficient
PSCs achieve a power conversion efficiency (PCE) of 19.90% with the
additional mp-TiO2 layer on a flexible substrate. Furthermore,
the unencapsulated flexible PSCs show enhanced storage stability and
bending durability. This work paves the way for the fabrication of
cost-effective and high-quality flexible PSCs with enhanced efficiency
and mechanical stability.
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uniform grain sizepower conversion efficiencyexcellent interfacial contactefficient pscs achieveperovskite film playelectron transport layer2 subquality flexible pscsprocessed mesoporous tioenhanced performance basedenhanced efficiencymesoporous tiointerfacial contactsflexible substratepscs ).work pavesupward growththin layerprevents voidsphotogenerated electronsperovskite grainsmechanical stabilitylayer leadscrucial rolebending durability