Recently, the teachers and students of CAMS & PUMC have been published in the Journal of Materials Chemistry C (JCR Zone 1, CAS Zone 3). If = 5.7) a research paper entitled Heat Dissipation Regulation for Improved Thermal Stability and Efficiency of Planar Perovskite Solar Cells was published online. The first author of the paper is Feng Jingyao, a master's degree candidate of the Institute, Dr. Wang Xin and Professor Chen Lifei from the School of Energy and Materials, and Shanghai Second Polytechnic University is the first communication unit.

Brief Introduction:

Perovskite solar cells (PSC) are promising next-generation photovoltaic cells due to their excellent power conversion efficiency (PCE). However, perovskite's low thermal conductivity result in insufficient heat transfer, and that resulting problem of thermal stability remain an obstacle to its further commercialization. This study developed an effective heat dissipation strategy by incorporating two-dimensional (2D) polymer semiconductor, graphitic carbon nitride (g-C3N4) nanosheets with high thermal conductivity into an electron transport layer (ETL) and perovskite absorber layer. The g-C3N4 nanosheets act as a heat transfer channel to dissipate the heat built up inside the device, thereby mitigating its efficiency decline. Among them, 2D g-C3N4 can effectively reduce the temperature of the device and suppress the thermally induced morphology degradation of the surface and the buried interface. Meanwhile, g-C3N4 helps extract electrons from perovskite to ETL and reduces interfacial charge recombination. The strategy achieved a solar cell efficiency improvement (~ 24.19%) and greatly improved the thermal stability of the cell, with the unpackaged device retaining 70% of its initial efficiency after 1000 hours of aging at 65 ° C. This work demonstrates the importance of heat dissipation strategies in achieving PSC long-term stability.

Link to the article: Https: / / pubs.rsc.org / en / content / articlelanding / 2025 / tc / d5tc00487j