Abstract
TiO2 has been widely adopted as an electron transport layer during the fabrication of efficient metal halide perovskite solar cells (MHP-SCs). In this study, we prepared acetylacetone (Acac)-modulated TiO2 nanoparticles (NPs) suitable for low-temperature solution processing via the sol-gel method. Acac coordinates with TiO2 NPs and preferably passivates surface trap states which are detrimental to photovoltaic performance. Moreover, the Acac-TiO2 NPs establish a favorable band alignment for charge extraction by donating the lone pair electron. As a result, Acac-TiO2 NPs based MHP-SCs exhibit an outstanding power conversion efficiency (PCE) of 21.20% attributed to facilitated charge extraction and reduced defect density. Furthermore, by implementing low-temperature solution-processable Acac-TiO2 NPs, we successfully demonstrated a remarkable PCE of 18.01% along with excellent mechanical stability, retaining 74.5% and 67.1% PCE after 5000 bending cycles in outward and inward directions from Acac-TiO2 NPs based MHP-SCs on a flexible substrate.
Original language | English |
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Pages (from-to) | 22819-22831 |
Number of pages | 13 |
Journal | International Journal of Energy Research |
Volume | 46 |
Issue number | 15 |
DOIs | |
Publication status | Published - 2022 Dec |
Keywords
- TiO
- acetylacetone
- flexible
- low temperature
- perovskite
- solar cells
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Nuclear Energy and Engineering
- Fuel Technology
- Energy Engineering and Power Technology