Author

Bo Cai

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Oct 2026

A paradoxical defect: Hydrogen interstitial in 2D perovskite with in-gap states but inefficient nonradiative recombination

Hydrogen interstitials (Hi) in three-dimensional and all-inorganic perovskites have often been discussed as electronically active defects that can promote nonradiative recombination or exhibit unconventional defect dynamics. In contrast, we show that, in the two-dimensional perovskite (PhDMA)PbI4 [(PhDMA)=C6H4(CH2NH3)2...

Bo Cai, Yue-Wen Wu, Jia-Yi Han et al. · Applied Physics Letters · 0 citations

Open access Sep 2026

Ultrathin nano-layered boron nitride stabilizing perovskite quantum dot-based light-emitting diodes

Perovskite quantum dot-based light-emitting diodes (QLEDs) have been regarded as promising emitters for lighting and displays. However, the operational stability still greatly hinders their practical applications. Here, we introduce ultrathin nano-layered boron nitride (BN) as buried interfacial layer to enhance device...

Jin-Di Wang, Hong Ren, Bo Cai et al. · Nature Communications · 0 citations

Preprint Aug 2026

A Unified Description of Electron-Phonon Coupling and Ion Migration in Metal Halide Perovskites

The remarkable optoelectronic properties of metal halide perovskites are closely linked to their unusually soft and polar chemical bonds that enable both strong electron-phonon interactions and ion migration. Yet these two defining characteristics have largely been treated as independent consequences of the same underl...

Bo Cai, Yannan Yang, Yoshiki Sugai et al. · 0 citations