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Multifunctional MXene for Thermal Management in Perovskite Solar Cells
Zhongquan Wan1,2, Runmin Wei3, Yuanxi Wang4
1National Key Laboratory of Electronic Films and Integrated Devices, School of Integrated Circuit Science and Engineering, University of Electronic Science and Technology of China, Chengdu, 611731, People's Republic of China. zqwan@uestc.edu.cn.
Nano-Micro Letters
|August 4, 2025
Summary
Perovskite solar cells (PSCs) stability is improved by adding Ti3C2TX MXene nanosheets. These nanosheets enhance thermal conductivity and passivate defects, boosting efficiency and heat resistance for durable photovoltaics.
Area of Science:
- Materials Science
- Energy Science
- Nanotechnology
Background:
- Perovskite solar cells (PSCs) show high power conversion efficiency (PCE) but suffer from heat accumulation, limiting stability.
- Continuous illumination causes heat buildup, degrading PSC performance and operational lifespan.
Purpose of the Study:
- To enhance thermal management and optoelectronic properties of PSCs.
- To investigate the multifunctional role of Ti3C2TX MXene nanosheets in PSCs.
Main Methods:
- Incorporating Ti3C2TX MXene nanosheets into the perovskite layer at grain boundaries.
- Measuring thermal conductivity, diffusivity, and device operating temperature.
- Evaluating optoelectronic properties, defect passivation, and charge transport.
Main Results:
- Ti3C2TX MXene addition reduced steady-state operating temperature from 42.96 to 39.97 °C.
- Modified PSCs achieved a champion PCE of 25.13% with improved thermal stability.
- PSCs retained 80% of initial PCE after 500h aging at 85°C/30% RH, significantly outperforming control devices.
Conclusions:
- Ti3C2TX MXene nanosheets effectively improve thermal conductivity and reduce operating temperature in PSCs.
- The nanosheets act as defect passivators and enhance charge extraction, leading to higher PCE.
- This strategy offers a pathway for developing highly efficient and thermally stable perovskite solar cells.
