Thiol‐Functionalized Conjugated Metal–Organic Frameworks for Stable and Efficient Perovskite Photovoltaics
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, School of Materials Science and Engineering Wuhan University of Technology Wuhan 430070 China, Hoffmann Institute of Advanced Materials Shenzhen Polytechnic 7098 Liuxian Boulevard Shenzhen 518055 China
- Molecular Foundry Division Lawrence Berkeley National Laboratory Berkeley CA 94720 USA
- The Hong Kong Polytechnic University Shenzhen Research Institute Guangdong Shenzhen 518057 China, Department of Electronic and Information Engineering, Research Institute for Smart Energy (RISE) The Hong Kong Polytechnic University Hung Hom Kowloon Hong Kong 999077 China
- Shenzhen Key Laboratory of Polymer Science and Technology, College of Materials Science and Engineering Shenzhen University Shenzhen 518060 China
- International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, Institute of Microscale Optoelectronics Shenzhen University Shenzhen 518060 China
- Hoffmann Institute of Advanced Materials Shenzhen Polytechnic 7098 Liuxian Boulevard Shenzhen 518055 China
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, School of Materials Science and Engineering Wuhan University of Technology Wuhan 430070 China
Metal–organic frameworks (MOFs) have been investigated recently in perovskite photovoltaics owing to their potential to boost optoelectronic performance and device stability. However, the impact of variations in the MOF side chain on perovskite characteristics and the mechanism of MOF/perovskite film formation remains unclear. In this study, three nanoscale thiol‐functionalized UiO‐66‐type Zr‐based MOFs (UiO‐66‐(SH) 2 , UiO‐66‐MSA, and UiO‐66‐DMSA) are systematically employed and examined in perovskite solar cells (PSCs). Among these MOFs, UiO‐66‐(SH) 2 , with its rigid organic ligands, exhibited a strong interaction with perovskite materials with more efficient suppression of perovskite vacancy defects. More importantly, A detailed and in‐depth discussion is provided on the formation mechanism of UiO‐66‐(SH) 2 ‐assisted perovskite film upon in situ GIWAXS performed during the annealing process. The incorporation of UiO‐66‐(SH) 2 additives substantially facilitates the conversion of PbI 2 into the perovskite phase, prolongs the duration of stage I, and induces a delayed phase transformation pathway. Consequently, the UiO‐66‐(SH) 2 ‐assisted device demonstrates reduced defect density and superior optoelectronic properties with optimized power conversion efficiency of 24.09% and enhanced long‐term stability under ambient environment and continuous light illumination conditions. This study acts as a helpful design guide for desired MOF/perovskite structures, enabling further advancements in MOF/perovskite optoelectronic devices.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- Guangdong Basic and Applied Basic Research Foundation; Hong Kong Polytechnic University; National Natural Science Foundation of China; Research Grants Council of Hong Kong; Shenzhen Science and Technology Innovation Commission; USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE)
- Grant/Contract Number:
- AC02-05CH11231
- OSTI ID:
- 2205400
- Alternate ID(s):
- OSTI ID: 2367191
OSTI ID: 2205402
- Journal Information:
- Advanced Science, Journal Name: Advanced Science Journal Issue: 4 Vol. 11; ISSN 2198-3844
- Publisher:
- Wiley Blackwell (John Wiley & Sons)Copyright Statement
- Country of Publication:
- Germany
- Language:
- English