Reducing Nonradiative Recombination in Halide Perovskites through Appropriate Band Gaps and Heavy Atomic Masses
Halide perovskite optoelectronic devices achieve high energy conversion efficiencies. However, their efficiency decreases significantly with an increase in temperature. This decline is likely caused by changes in nonradiative recombination and electron-phonon coupling, which remain underexplored. When the perovskite lattice temperature increases, anharmonicity induces energy level fluctuation and band gap narrowing by modulating electron-phonon interactions. As lattice vibrations intensify, high-frequency phonons progressively dominate the carrier dynamic processes in halide perovskites, thereby strengthening the coupling between the electronic subsystem and high-frequency phonons. The increased overlap of electron wave functions strengthens non-adiabatic coupling, thereby accelerating the nonradiative recombination process. On the basis of these findings, we propose the introduction of appropriate band gap materials and heavy atoms at the B-site and X-site to modulate electron-phonon coupling, thereby mitigating nonradiative recombination and enhancing halide perovskite solar cell performance.
Authors
- Junmin Xia (ORCID: https://orcid.org/0000-0002-9805-5397)
- Shufen Chen (ORCID: https://orcid.org/0000-0003-0333-958X)
- Jibin Zhang (ORCID: https://orcid.org/0000-0001-5554-0950)
- Siyu Chen (ORCID: https://orcid.org/0000-0003-2005-2273)
- Yangzhi Ma
- Wei Shen (ORCID: https://orcid.org/0000-0002-8919-8273)
- Bo Cai (ORCID: https://orcid.org/0000-0002-6605-5931)
- Yang Bing (ORCID: https://orcid.org/0000-0002-8966-9565)
- Yi Liu (ORCID: https://orcid.org/0000-0002-3954-6102)
- Lihui Liu (ORCID: https://orcid.org/0000-0002-9659-6229)
- Kun Cao (ORCID: https://orcid.org/0009-0000-7779-0598)
Institutions
- University of Cambridge (GB)
- Zhengzhou University (CN)
- Nanjing University of Posts and Telecommunications (CN)
Publication Details
- Journal
- The Journal of Physical Chemistry Letters
- Published
- 2025-01-27
- DOI
- https://doi.org/10.1021/acs.jpclett.4c03358
- Citations
- 8
- Primary Topic
- Perovskite Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 5.84
Funders
- Synergetic Innovation Center for Organic Electronics and Information Displays
- National Natural Science Foundation of China
- Jilin University
- China Scholarship Council
- Natural Science Foundation of Jiangsu Province
- Nanjing University of Posts and Telecommunications
- Jiangsu Science and Technology Department
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- Natural Science Research of Jiangsu Higher Education Institutions of China
- Graduate Research and Innovation Projects of Jiangsu Province