DataVXACS Applied Materials & InterfacesPaper
journal article·2020-04-01

Inverted Si:PbS Colloidal Quantum Dot Heterojunction-Based Infrared Photodetector

Kaimin Xu, Xiongbin Xiao, Wenjia Zhou, Xianyuan Jiang, Qi Wei, Hao Chen, Zhuo Deng, Jian Huang, Baile Chen, Zhijun Ning

ACS Applied Materials & Interfaces· Volume 12· Issue 13
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Source abstract

Abstract

Silicon and PbS colloidal quantum dot heterojunction photodetectors combine the advantages of the Si device and PbS CQDs, presenting a promising strategy for infrared light detecting. However, the construction of a high-quality CQDs:Si heterojunction remains a challenge. In this work, we introduce an inverted structure photodetector based on n-type Si and p-type PbS CQDs. Compared with the existing normal structure photodetector with p-type Si and n-type PbS CQDs, it has a lower energy band offset that provides more efficient charge extraction for the device. With the help of Si wafer surface passivation and the Si doping density optimization, the device delivers a high detectivity of 1.47 × 1011 Jones at 1540 nm without working bias, achieving the best performance in Si/PbS photodetectors in this region now. This work provides a new strategy to fabricate low-cost high-performance PbS CQDs photodetectors compatible with silicon arrays.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Quantum Dots Synthesis And Properties · Chalcogenide Semiconductor Thin Films · Nanowire Synthesis and Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Physical Science and Technology, ShanghaiTech University, 393 Middle Huaxia Road, Pudong, Shanghai 201210, China

State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China

University of Chinese Academy of Sciences, Beijing 100049, China

School of Information Science and Technology, ShanghaiTech University, 393 Middle Huaxia Road, Pudong, Shanghai 201210, China

Funding

Ministry of Science and Technology of the People's Republic of China · Science and Technology Commission of Shanghai Municipality · ShanghaiTech University · National Natural Science Foundation of China · Centre for High-resolution Electron Microscopy, ShanghaiTech University · Central People's Government of the People's Republic of China · Analytical Instrumentation Center,ShanghaiTech University

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