Metal halide perovskite quantum dots(MHPQDs)have attracted intensive interest because of their unique optoelectronic properties.Their undesirable degradation upon exposure to humidity and/or heat,however,poses a dear ...Metal halide perovskite quantum dots(MHPQDs)have attracted intensive interest because of their unique optoelectronic properties.Their undesirable degradation upon exposure to humidity and/or heat,however,poses a dear challenge for the practical applications.Herein we report a facile strategy to develop sintering-resistant MHPQDs,e.g.CsPbBr_(3),by localizing them on the surface of inorganic support such as hydroxyapatite(HAP).The chemical interaction between CsPbBr_(3)quantum dots(QDs)and HAP support originates from the occupation of Br vacancies in CsPbBr_(3)by the-O-on the surface of HAP support,which not only stabilizes the small particle sizes(~2.2 nm)of CsPbBr_(3)QDs upon high-temperature(up to 400℃)calcination but also greatly enhances its photoluminescence emission intensity by about150 times.Interestingly,the supported CsPbBr_(3)QDs decorated by cetyltrimethylammonium bromide can further produce water-resistant CsPbBr_(3)@CsPb_(2)Br_(5)QDs.The obtained sintering-resistant hydroxyapatite-supported CsPbBr_(3)@CsPb_(2)Br_(5)QDs can be used to fabricate green light emitting diodes(LED)devices with high luminous intensity for medicolegal identification,flexible luminescence film for display,and potential fluorescent label for bioimaging/biosensing applications.This work demonstrates a novel strategy to design and develop robust all-inorganic QDs composites that may find wide applications in diverse environmental conditions,including high temperature and/or high humidity.展开更多
基金financially supported by the National Natural Science Foundation of China(No.82171883)the Shanxi Provincial Key Research and Development Project(202102130501002)+1 种基金the Science and Technology Innovation Leader and Key Talent Team Project of Shanxi Province(202204051002034)the NSFC Center for Single-Atom Catalysis(22388102)。
文摘Metal halide perovskite quantum dots(MHPQDs)have attracted intensive interest because of their unique optoelectronic properties.Their undesirable degradation upon exposure to humidity and/or heat,however,poses a dear challenge for the practical applications.Herein we report a facile strategy to develop sintering-resistant MHPQDs,e.g.CsPbBr_(3),by localizing them on the surface of inorganic support such as hydroxyapatite(HAP).The chemical interaction between CsPbBr_(3)quantum dots(QDs)and HAP support originates from the occupation of Br vacancies in CsPbBr_(3)by the-O-on the surface of HAP support,which not only stabilizes the small particle sizes(~2.2 nm)of CsPbBr_(3)QDs upon high-temperature(up to 400℃)calcination but also greatly enhances its photoluminescence emission intensity by about150 times.Interestingly,the supported CsPbBr_(3)QDs decorated by cetyltrimethylammonium bromide can further produce water-resistant CsPbBr_(3)@CsPb_(2)Br_(5)QDs.The obtained sintering-resistant hydroxyapatite-supported CsPbBr_(3)@CsPb_(2)Br_(5)QDs can be used to fabricate green light emitting diodes(LED)devices with high luminous intensity for medicolegal identification,flexible luminescence film for display,and potential fluorescent label for bioimaging/biosensing applications.This work demonstrates a novel strategy to design and develop robust all-inorganic QDs composites that may find wide applications in diverse environmental conditions,including high temperature and/or high humidity.
