Halide perovskites have become a hot topic in materials research due to their potential applications in a variety of fields,from optoelectronic and thermoelectric devices to solar cells.Doping of halide perovskites ca...Halide perovskites have become a hot topic in materials research due to their potential applications in a variety of fields,from optoelectronic and thermoelectric devices to solar cells.Doping of halide perovskites can be achieved by introducing different types of dopants,such as metal cations,anions,and organic molecules,leading to increased stability and improved optoelectronic properties.Moreover,doping can introduce new functionalities,such as increased spin lifetime and thermal stability.These features make doped halide perovskites a highly promising candidate for optoelectronic applications.In this mini-review,we highlight the latest advances in ion-doped halide perovskites and their immense potential for various applications.展开更多
Spatial resolution is an important criterion to evaluate the performance of a scintillation screen for X-ray imaging.Perovskite-based X-ray screen,usually made of powders or polycrystalline films,suffers from low spat...Spatial resolution is an important criterion to evaluate the performance of a scintillation screen for X-ray imaging.Perovskite-based X-ray screen,usually made of powders or polycrystalline films,suffers from low spatial resolution(~200μm)due to the large thickness of scintillation layer despite of their compelling sensitivity to X-ray dose.In this work,a concentrated colloid of CsPbBr_(3)nanosheets was synthesized via a co-precipitation method at ambient condition.By drop casting,smooth scintillation screens of varied thickness were formed through self-assembly,which exhibited both high internal and external photoluminescence quantum yield(PL QY)(84.5%and 75.1%,respectively).The screen-based X-ray detector showed a high sensitivity down to 27 nGy/s,two orders of magnitude lower than the regular dose for medical diagnostics.Importantly,the screen of optimal thickness of 15μm showcased an unprecedented spatial resolution(26μm)when used for X-ray radiography,representing one order of magnitude improvement in perovskite community.展开更多
基金supported by the Singapore Quantum engineering program(grant no.RF2021-QEP2-03-P10)the National Research Foundation,the Prime Minister’s Office,and the government of Singapore under its Competitive Research Programme(award no.NRF-CRP23-2019-0002)its NRF Investigatorship Programme(award no.NRF-NRFI05-2019-0003).
文摘Halide perovskites have become a hot topic in materials research due to their potential applications in a variety of fields,from optoelectronic and thermoelectric devices to solar cells.Doping of halide perovskites can be achieved by introducing different types of dopants,such as metal cations,anions,and organic molecules,leading to increased stability and improved optoelectronic properties.Moreover,doping can introduce new functionalities,such as increased spin lifetime and thermal stability.These features make doped halide perovskites a highly promising candidate for optoelectronic applications.In this mini-review,we highlight the latest advances in ion-doped halide perovskites and their immense potential for various applications.
基金the National Natural Science Foundation of China(No.21805111)Natural Science Foundation of Shandong Province(No.ZR2020YQ12)Taishan Scholar Project of Shandong Province(No.tsqn201812082).
文摘Spatial resolution is an important criterion to evaluate the performance of a scintillation screen for X-ray imaging.Perovskite-based X-ray screen,usually made of powders or polycrystalline films,suffers from low spatial resolution(~200μm)due to the large thickness of scintillation layer despite of their compelling sensitivity to X-ray dose.In this work,a concentrated colloid of CsPbBr_(3)nanosheets was synthesized via a co-precipitation method at ambient condition.By drop casting,smooth scintillation screens of varied thickness were formed through self-assembly,which exhibited both high internal and external photoluminescence quantum yield(PL QY)(84.5%and 75.1%,respectively).The screen-based X-ray detector showed a high sensitivity down to 27 nGy/s,two orders of magnitude lower than the regular dose for medical diagnostics.Importantly,the screen of optimal thickness of 15μm showcased an unprecedented spatial resolution(26μm)when used for X-ray radiography,representing one order of magnitude improvement in perovskite community.
