Hybrid Bulk-Heterojunction of Colloidal Quantum Dots and Mixed-Halide Perovskite Nanocrystals for High-Performance Self-Powered Broadband Photodetectors

被引：126
作者：
Sulaman, Muhammad [1 ,2 ,3 ]
Yang, Shengyi [1 ,2 ,4 ]
Bukhtiar, Arfan [5 ,6 ]
Tang, Peiyun [1 ,2 ]
Zhang, Zhenheng [1 ,2 ]
Song, Yong [3 ]
Imran, Ali [7 ]
Jiang, Yurong [3 ]
Cui, Yanyan [3 ]
Tang, Libin [4 ]
Zou, Bingsuo [5 ,6 ]
机构：
[1] Beijing Inst Technol, Sch Phys, Beijing Key Lab Nanophoton & Ultrafine Optoelect, Beijing 100081, Peoples R China
[2] Beijing Inst Technol, Sch Phys, Key Lab Adv Optoelect Quantum Design & Measuremen, Minist Educ, Beijing 100081, Peoples R China
[3] Beijing Inst Technol, Sch Opt & Photon, Beijing Key Lab Precis Optoelect Measurement Inst, Beijing 100081, Peoples R China
[4] Kunming Inst Phys, Kunming 650223, Yunnan, Peoples R China
[5] Guangxi Univ, Sch Phys Sci & Technol, MOE Key Lab New Proc Technol Nonferrous Met & Mat, Nanning 530004, Peoples R China
[6] Guangxi Univ, Sch Phys Sci & Technol, Guangxi Key Lab Proc Nonferrous Met & Featured Ma, Nanning 530004, Peoples R China
[7] Zhejiang Univ, Sch Micronanoelect, ZJU Hangzhou Global Sci & Technol Innovat Ctr, State Key Labs Silicon Mat & Modern Opt Instrumen, Hangzhou 311200, Peoples R China
来源：
ADVANCED FUNCTIONAL MATERIALS | 2022年 / 32卷 / 28期
关键词：
bulk-heterojunctions; mixed-halide perovskite nanocrystals; PbSe colloidal quantum dots; self-powered photodetectors; PBSE; EMISSION;
D O I：
10.1002/adfm.202201527
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Self-powered broadband photodetectors exhibit excellent self-powered and wide-band photoresponse from visible to infrared region and attract enormous attention due to their promising applications in imaging, sensing, and optical communication. PbSe colloidal quantum dots (CQDs) and halide perovskites nanocrystals (NCs) are commonly used for photodetectors due to their strong absorption capability, tunable bandgap, and high aspect ratio. However, due to suffering from low charge carrier mobility and high trap density, the performance of individual PbSe CQDs and perovskites-based photodetectors is not satisfactory. Integration of PbSe CQDs with inorganic mixed-halide perovskite nanomaterials can provide an opportunity to overcome these drawbacks. In this work, a hybrid nanocomposite of PbSe CQDs blended with all-inorganic mixed halide perovskite NCs is integrated to fabricate bulk-heterojunction-based high-performance photodetectors. The transportation of photogenerated carriers is enhanced by employing electrons- and holes-extracting layers. As a result, the photoresponsivity of 6.16 A W-1 and a specific detectivity of 5.96 x 10(13) Jones with an ON/OFF current ratio of 10(5) is obtained for bulk-heterojunction photodetector ITO/ZnO/PbSe:CsPbBr1.5I1.5/P3HT/Au in the self-powered mode. Meanwhile, the device performance of the fabricated photodetector is numerically simulated by using Technology Computer-Aided Design software, and the physical mechanisms for photogenerated carriers' transportation are discussed in detail.
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页数：12
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