PbSe Nanocrystals Produced by Facile Liquid Phase Exfoliation for Efficient UV-Vis Photodetectors

被引：52

作者：

Gao, Lingfeng ^{[1
,2
]}

Wang, Rui ^{[3
]}

Kuklin, Artem V. ^{[4
]}

Zhang, Han ^{[1
,2
]}

Agren, Hans ^{[4
,5
]}

机构：

[1] Shenzhen Univ, Inst Microscale Optoelect, Collaborat Innovat Ctr Optoelect Sci & Technol, Key Lab Optoelect Devices & Syst,Minist Educ, Shenzhen 518060, Peoples R China

[2] Shenzhen Univ, Guangdong Prov Coll Phys & Optoelect Engn, Shenzhen Key Lab Micronano Photon Informat Techno, Guangdong Lab Artificial Intelligence & Digital E, Shenzhen 518060, Peoples R China

[3] Peking Univ, Sch Phys, State Key Lab Mesoscop Phys & Frontiers, Sci Ctr Nanooptoelect, Beijing 100871, Peoples R China

[4] Uppsala Univ, Dept Phys & Astron, SE-75120 Uppsala, Sweden

[5] Henan Univ, Coll Chem & Chem Engn, Kaifeng 475004, Henan, Peoples R China

来源：

ADVANCED FUNCTIONAL MATERIALS | 2021年 / 31卷 / 17期

基金：

中国国家自然科学基金;

关键词：

liquid phase exfoliation; nanocrystals; transient optical response; photodetector; density functional theory; GRAPHENE; TRANSPORT; SURFACE;

D O I：

10.1002/adfm.202010401

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Lead selenide (PbSe)-based nanomaterials have been extensively investigated as building blocks for next-generation optoelectronic devices owing to their unique properties. In this work, PbSe nanocrystals (NCs) have been successfully fabricated by a facile liquid phase exfoliation approach and directly applied as active materials for photo-electrochemical (PEC)-type photodetectors (PDs). Taking advantage of broadband absorption and fast carrier dynamics, the PbSe NCs-based PDs exhibit excellent photo-current density (11.88 mu A cm(-2)), photo-responsivity (12.37 mA W-1), response/recovery time (0.12/0.13 s), and long-term cycling stability. The working mechanism of PbSe NCs-based PDs is explored by density functional theory calculations based on their structural and electronic properties under various conditions. It is anticipated that this contribution paves the way to readily fabricate low-dimensional PbSe NCs and extend their practical applications in PEC-type PDs.

引用

页数：12

共 80 条

[1] AC impedance and cyclic voltammetry studies on PbS semiconducting film prepared by electrodeposition [J].