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Conferences > EQEC > 2023 > eg_p > eg_p_8
  • Conference on Lasers and Electro-Optics/Europe (CLEO/Europe 2023) and European Quantum Electronics Conference (EQEC 2023)
  • Technical Digest Series (Optica Publishing Group, 2023),
  • paper eg_p_8

Uncovering the Physics of Ultraslow Hot-exciton Relaxation and Interparticle Auger Coupling in HgTe Quantum Dots

Kezhou Fan, Kseniia A. Sergeeva, Aleksandr A. Sergeev, Lu Zhang, Christopher C. S. Chan, Zhuo Li, Xiaoyan Zhong, Stephen V. Kershaw, Junwei Liu, Andrey L. Rogach, and Kam Sing Wong

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Abstract

The performance of semiconductor-based optoelectronic devices is dominated by hot-carrier/exciton (HC/HE) relaxation [1]. Past thermodynamic calculations have revealed that the power conversion efficiency of single-junction solar cells under 1 sun illumination can reach around 66% if the electron/hole excess energy is fully harvested [2]. Such efficient HC/HE extraction necessitates retarded intra-band relaxation. Nevertheless, the rapid HC/HE cooling constitutes a major loss channel for solar cell efficiency, and how to decelerate the HC/HE cooling still remains one of the cruxes for high-efficiency photovoltaic devices.

© 2023 IEEE

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