【摘 要】
：
Doping enables manipulation of both the electrical and optical properties of halide perovskites.Herein,we incorporated Te4+ into Cs2ZrCl6 single crystal,simultaneously preserving the vacancy-ordered struc-ture,to obtain an efficient yellow-emitting perovs
【机 构】
：
State Key Laboratory of Molecular Reaction Dynamics,Dalian Institute of Chemical Physics,Chinese Aca
论文部分内容阅读
Doping enables manipulation of both the electrical and optical properties of halide perovskites.Herein,we incorporated Te4+ into Cs2ZrCl6 single crystal,simultaneously preserving the vacancy-ordered struc-ture,to obtain an efficient yellow-emitting perovskite with a near-unity photoluminescence quantum yield (PLQY ≈ 97.6％).Te4+ doping modifies the hue and emission color of pristine Cs2ZrCl6,generates new absorption channels,and successfully extends the excitation energy from ＜ 280 nm to 360-450 nm range.Detailed spectral characterizations,including ultrafast femtosecond transient absorption measurements,reveal that the bright yellow light is derived from triplet self-trapped excitons.Moreover,further tuning doping concentration enables Te-doped Cs2ZrCl6 single crystals to exhibit efficient warm white light emission.This work provides a new perspective for the development and design of stable lead-free perovskites with highly efficient luminescence.
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