Broadband perovskite quantum dot spectrometer beyond human visual resolution  

作　　者：Xiaoxiu Zhu Liheng Bian Hao Fu Lingxue Wang Bingsuo Zou Qionghai Dai Jun Zhang Haizheng Zhong 

机构地区：[1]MIIT Key Laboratory for Low-dimensional Quantum Structure and Devices,Beijing Institute of Technology,100081 Beijing,China [2]School of Materials Science&Engineering,Beijing Institute of Technology,100081 Beijing,China [3]School of Information and Electronics&Advanced Research Institute of Multidisciplinary Science,Beijing Institute of Technology,100081 Beijing,China [4]Beijing Key Laboratory of Nanophotonics and Ultrafine Optoelectronic Systems,School of Optics and Photonics,Beijing Institute of Technology,100081 Beijing,China [5]Department of Automation&School of Information Science and Technology,Tsinghua University,100086 Beijing,China [6]Beijing National Research Center for Information Science and Technology,100086 Beijing,China

出　　处：《Light(Science & Applications)》2020年第1期1329-1337,共9页光（科学与应用)（英文版）

基　　金：supported by the National Key R&D Program(No.2017YFB0404600);National Natural Science Foundation of China(61722502,61971045,61827901);Fundamental Research Funds for the Central Universities(3052019024).

摘　　要：The quantum dot spectrometer,fabricated by integrating different quantum dots with an image sensor to reconstruct the target spectrum from spectral-coupled measurements,is an emerging and promising hyperspectrometry technology with high resolution and a compact size.The spectral resolution and spectral range of quantum dot spectrometers have been limited by the spectral variety of the available quantum dots and the robustness of algorithmic reconstruction.Moreover,the spectrometer integration of quantum dots also suffers from inherent photoluminescence emission and poor batch-to-batch repeatability.In this work,we developed nonemissive in situ fabricated MA_(3)Bi_(2)X_(9) and Cs_(2)SnX_(6)(MA=CH_(3)NH_(3);X=Cl,Br,I)perovskite-quantum-dot-embedded films(PQDFs)with precisely tunable transmittance spectra for quantum dot spectrometer applications.The resulting PQDFs contain in situ fabricated perovskite nanocrystals with homogenous dispersion in a polymeric matrix,giving them advantageous features such as high transmittance efficiency and good batch-to-batch repeatability.By integrating a filter array of 361 kinds of PQDFs with a silicon-based photodetector array,we successfully demonstrated the construction of a perovskite quantum dot spectrometer combined with a compressive-sensing-based total-variation optimization algorithm.A spectral resolution of ~1.6 nm was achieved in the broadband of 250-1000 nm.The performance of the perovskite quantum dot spectrometer is well beyond that of human eyes in terms of both the spectral range and spectral resolution.This advancement will not only pave the way for using quantum dot spectrometers for practical applications but also significantly impact the development of artificial intelligence products,clinical treatment equipment,scientific instruments,etc.

关 键 词：quantum PEROVSKITE BATCH 

分 类 号：O41[理学—理论物理]