Adjusting Microscale to Atomic-Scale Structural Order in PbS Nanocrystal Superlattice for Enhanced Photodetector Performance

Wang，Chuanglei1,2; Chen，Zhenjun1,2; Liu，Zheng1,2; Ma，Tianchan1,2; Chen，Xiya1,2; Zhang，Menglong1,2; Luo，Dongxiang3; Hyun，Byung Ryool4; Liu，Xiao1,2

2023

10.1002/smll.202300975

Small   影响因子和分区

1613-6810

1613-6829

An investigation is presented into the effect of the long-range order on the optoelectronic properties of PbS quantum dot (QD) superlattices, which form mesocrystals, for potential use in photodetector applications. By self-assembly of QD nanocrystals on an Si/SiO substrate, a highly ordered and densely packed PbS QD superlattice with a microscale size is obtained. The results demonstrate that annealing treatment induces mesocrystalline superlattices with preferred growth orientation, achieved by dislodging ligands. The improved orientation and electronic coupling of the mesocrystalline superlattices exhibit superior photodetector performance compared to disordered QD structures and closely packed superlattices. This improved performance is attributed to atomic alignment between QDs, leading to enhanced electronic coupling. The findings suggest that these mesocrystalline superlattices have promising potential for the next generation of QD optoelectronic devices.

crystallographic alignment mesocrystalline orientation photodetectors quantum dot superlattices

SCI ; EI

英语

其他

National Natural Science Foundation of China["22102058","62074060"] ; Science and Technology Program of Guangzhou[202103030001] ; Natural Science Foundation of Guangdong Province["2018030310031","2020B1515120022","2020B1515020032"] ; Key-Area Research and Development Program of Guangdong Province[2021B0101310003]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:000973605000001

WILEY-V C H VERLAG GMBH

20231613942035

Atoms ; Crystal atomic structure ; IV-VI semiconductors ; Lead compounds ; Nanocrystals ; Photons ; Semiconductor quantum dots ; Silicon ; Silicon compounds

Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals:549.3 ; Semiconducting Materials:712.1 ; Semiconductor Devices and Integrated Circuits:714.2 ; Nanotechnology:761 ; Atomic and Molecular Physics:931.3 ; Crystalline Solids:933.1 ; Crystal Lattice:933.1.1

2-s2.0-85152782877

Scopus

1.School of Semiconductor Science and Technology,South China Normal University,Guangzhou,510631,China
2.Guangdong Provincial Key Laboratory of Chip and Integration Technology,Guangzhou,510631,China
3.Huangpu Hydrogen Innovation Center/Guangzhou Key Laboratory for Clean Energy and Materials,School of Chemistry and Chemical Engineering,Guangzhou University,Guangzhou,510006,China
4.Department of Electrical and Electronic Engineering,Southern University of Science and Technology,Shenzhen,518055,China

Wang，Chuanglei,Chen，Zhenjun,Liu，Zheng,et al. Adjusting Microscale to Atomic-Scale Structural Order in PbS Nanocrystal Superlattice for Enhanced Photodetector Performance[J]. Small,2023,19(32).

Wang，Chuanglei.,Chen，Zhenjun.,Liu，Zheng.,Ma，Tianchan.,Chen，Xiya.,...&Liu，Xiao.(2023).Adjusting Microscale to Atomic-Scale Structural Order in PbS Nanocrystal Superlattice for Enhanced Photodetector Performance.Small,19(32).

Wang，Chuanglei,et al."Adjusting Microscale to Atomic-Scale Structural Order in PbS Nanocrystal Superlattice for Enhanced Photodetector Performance".Small 19.32(2023).