Ultrafast Carrier Drift Transport Dynamics in CsPbI3 Perovskite Nanocrystalline Thin Films

被引：3

作者：

Kobbekaduwa, Kanishka ^{[1
]}

Liu, Exian ^{[1
]}

Zhao, Qian ^{[2
,3
]}

Bains, Jasjit Singh ^{[4
]}

Zhang, Jianbing ^{[5
]}

Shi, Ying ^{[6
]}

Zheng, Haimei ^{[7
]}

Li, Dawen ^{[8
]}

Cai, Tong ^{[9
]}

Chen, Ou ^{[9
]}

Rao, Apparao M. ^{[1
]}

Beard, Matthew C. ^{[2
]}

Luther, Joseph M. ^{[2
]}

Gao, Jianbo ^{[4
]}

机构：

[1] Clemson Univ, Dept Phys & Astron, Clemson, SC 29634 USA

[2] Natl Renewable Energy Lab, Chem & Nanosci Ctr, Golden, CO 80401 USA

[3] Nankai Univ, Sch Mat Sci & Engn, Tianjin 300350, Peoples R China

[4] Brock Univ, Dept Chem, Yousef Haj Ahmad Dept Engn, St Catharines, ON L2S 3A1, Canada

[5] Huazhong Univ Sci & Technol, Sch Opt & Elect Informat, Wuhan 430074, Peoples R China

[6] Jilin Univ, Inst Atom & Mol Phys, Jilin Prov Key Lab Appl Atom & Mol Spect, Changchun 130012, Peoples R China

[7] Lawrence Berkeley Natl Lab, Mat Sci Div, Berkeley, CA 94720 USA

[8] Univ Alabama, Ctr Mat Informat Technol, Dept Elect & Comp Engn, Tuscaloosa, AL 35487 USA

[9] Brown Univ, Dept Chem, Providence, RI 02912 USA

来源：

ACS NANO | 2023年 / 17卷 / 14期

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

phonons; polarons; mobility; photocurrent; scattering; CHARGE-TRANSPORT; ELECTRON; MOBILITY; GAAS;

D O I：

10.1021/acsnano.3c03989

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We study the early time carrier drift dynamics in CsPbI3 nanocrystal thin films with a sub 25 ps time resolution.Prior totrapping, carriers exhibit band-like transport characteristics, whichis similar to those of traditional semiconductor solar absorbers includingSi and GaAs due to optical phonon and carrier scattering at high temperatures.In contrast to the popular polaron scattering mechanism, the CsPbI3 nanocrystal thin film demonstrates the strongest opticalphonon scattering mechanism among other inorganic-organic hybridperovskites, Si, and GaAs. This ultrafast dynamics study establishesa foundation for understanding the fundamental carrier drift propertiesthat drive perovskite nanocrystal optoelectronics.

引用

页码：13997 / 14004

页数：8

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