基于含氯配体后处理 CsPbBr₃ 纳米晶用于青光LED

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中图分类号：0482.31 文献标识码：ADOI：10.37188/CJL.20250059 CSTR：32170.14.CJL.20250059

Abstract：Inorganicperovskite CsPbX3 （ X =Cl，Br，I）nanocrystals（PNCs）have the advantages highluminous efciencyadjustableemission wavelength，buttheir poor stabilitylimitspracticalapplications.This study employschlorine-containing ligs forpost-treatment to synthesize CsPb（Br/Cl）3 PNCs with tunable emission colors investigates their luminescent properties stability.The introduced Cl-ions exchange with Br'in CsPbB 13 （20 PNCs passivate surfacedefects.Byadjusting the concentration the chlorine-containing ligs，the emission CsPb（Br/Cl）3 PNCs can be tuned from green to blue light. Notably，cyan-emitting CsPb（Br/Cl）3 PNCs maintain high luminescence intensityafter being immersed in water for15days，with stable emision peak position full width at half maximum（FWHM）.Their photoluminescence quantum yield（PLQY） improves compared to untreated CsPbB 13 PNCs.Finally，acyan-light-emitting diode（LED）usingCsPb（Br/Cl） 3 PNCswith a 370 nm chip was fabricated，achievingCIE chromaticitycoordinates（0.116，0.264），showing potentialtosupplementthecyan light in white LEDs.

KeyWords：perovskite nanocrystals；halogenated lig；stability；light emittingdiode

1引言

全无机钙钛矿 CsPbX3 0 X=Cl，Br，I） 纳米晶（PNCs）具有优越的光学特性，例如发光效率高、发射波长可实现蓝光到红光的全光谱调节等[-3]。（剩余16952字）