Synergic Surface Modifications of PbS Quantum Dots by Sodium Acetate in Solid-State Ligand Exchange toward Short-Wave Infrared Photodetectors

Wang, Xiao1,2,3; Song, Zhulu4,5; Tang, Haodong6; Li, Yiwen3; Zhong, Huaying7; Wu, Jiufeng1,2; Wang, Weichao1,2; Chen, Simin1,2; Zhang, Wenjie1,2; Fang, Fan1,2; Hao, Junjie6; Wu, Dan8; Mueller-Buschbaum, Peter7; Cao, Leifeng1,2; Tang, Zeguo8; Tang, Jun8; Zhang, Lei3; Wang, Kai4,5; Chen, Wei1,2,4,5

2024-08-01

10.1021/acsami.4c05201

ACS APPLIED MATERIALS & INTERFACES   影响因子和分区

1944-8244

1944-8252

PbS quantum dots (QDs) are promising for short-wave infrared (SWIR) photodetection and imaging. Solid-state ligand exchange (SSLE) is a low-fabrication-threshold QD solid fabrication method. However, QD treatment by SSLE remains challenging in seeking refined surface passivation to achieve the desired device performance. This work investigates using NaAc in the ligand exchange process to enhance the film morphology and electronic coupling configuration of QD solids. By implementing various film and photodetector device characterization studies, we confirm that adding NaAc with a prominent adding ratio of 20 wt % NaAc with tetrabutylammonium iodide (TBAI) in the SSLE leads to an improved film morphology, reduced surface roughness, and decreased trap states in the QD solid films. Moreover, compared to the devices without NaAc treatment, those fabricated with NaAc-treated QD solids exhibit an enhanced performance, including lower dark current density (<100 nA/cm(2)), faster response speed, higher responsivity, detectivity, and external quantum efficiency (EQE reaching 25%). The discoveries can be insightful in developing efficient, low-cost, and low-fabrication-threshold QD SWIR detection and imager applications.

PbS quantum dots solid-state ligand exchange short-wave infrared photodetector GISAXS

SCI ; EI

英语

通讯

National Natural Science Foundation of China["12204318","62204107","51825301","62122034","62261136552"] ; Guangdong Basic and Applied Basic Research Foundation["2021A1515110535","2022A151511140","2022A1515011614"] ; Shenzhen Science and Technology Program["RCYX20221008092908030","ZDSYS20200811143600001","JCYJ20220818100406014"] ; Natural Science Foundation of Top Talent of SZTU["GDRC202340","GDRC202344","GDRC202345","GDRC202348"] ; Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germanys Excellence Strategy[EXC 2089/1-390776260]

Science & Technology - Other Topics ; Materials Science

Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:001282955300001

AMER CHEMICAL SOC

Web of Science

1.Shenzhen Technol Univ, Ctr Intense Laser Applicat Technol, Shenzhen Key Lab Ultraintense Laser & Adv Mat Tech, Shenzhen 518118, Peoples R China
2.Shenzhen Technol Univ, Coll Engn Phys, Shenzhen 518118, Peoples R China
3.Hubei Univ, Sch Mat Sci & Engn, Wuhan 430062, Peoples R China
4.Southern Univ Sci & Technol, Inst Nanosci & Applicat, Shenzhen 518055, Peoples R China
5.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China
6.Shenzhen Technol Univ, Coll Integrated Circuits & Optoelect Chips, Shenzhen 518118, Peoples R China
7.Tech Univ Munich, TUM Sch Nat Sci, Dept Phys, Chair Funct Mat, D-85748 Garching, Germany
8.Shenzhen Technol Univ, Coll New Mat & New Energies, Shenzhen 518118, Peoples R China

Wang, Xiao,Song, Zhulu,Tang, Haodong,et al. Synergic Surface Modifications of PbS Quantum Dots by Sodium Acetate in Solid-State Ligand Exchange toward Short-Wave Infrared Photodetectors[J]. ACS APPLIED MATERIALS & INTERFACES,2024.

Wang, Xiao.,Song, Zhulu.,Tang, Haodong.,Li, Yiwen.,Zhong, Huaying.,...&Chen, Wei.(2024).Synergic Surface Modifications of PbS Quantum Dots by Sodium Acetate in Solid-State Ligand Exchange toward Short-Wave Infrared Photodetectors.ACS APPLIED MATERIALS & INTERFACES.

Wang, Xiao,et al."Synergic Surface Modifications of PbS Quantum Dots by Sodium Acetate in Solid-State Ligand Exchange toward Short-Wave Infrared Photodetectors".ACS APPLIED MATERIALS & INTERFACES (2024).