Assessing the Optoelectronic Performance of Halide Perovskite Quantum Dots with Identical Bandgaps: Composition Tuning Versus Quantum Confinement

Long Hu; Xinwei Guan; Hehe Huang; Tingting Ye; Junfeng Ding; Aarti Aarti; Koushik Venkatesan; Weizhen Wang; Fandi Chen; Chun Ho Lin; Tao Wan; Mengyao Li; Jiabao Yi; Rongkun Zheng; Dewei Chu; Songhua Cai; Jiayi Chen; Claudio Cazorla; Jianyu Yuan; Yang Bai; Tom Wu; Shujuan Huang

doi:10.1021/acsenergylett.4c01180

Assessing the Optoelectronic Performance of Halide Perovskite Quantum Dots with Identical Bandgaps: Composition Tuning Versus Quantum Confinement

Long Hu
, Xinwei Guan
, Hehe Huang
, Tingting Ye
, Junfeng Ding
, Aarti Aarti
, Koushik Venkatesan
, Weizhen Wang
, Fandi Chen
, Chun Ho Lin
, Tao Wan
, Mengyao Li
, Jiabao Yi
, Rongkun Zheng
, Dewei Chu^*
, Songhua Cai^*
, Jiayi Chen
, Claudio Cazorla
, Jianyu Yuan^*
, Yang Bai

Tom Wu^*, Shujuan Huang^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

Abstract

Halide perovskite quantum dots (QDs) have been considered promising materials for constructing low-cost, high-performing optoelectronics. Tuning their bandgaps can be accomplished through size-dependent quantum confinement or altering chemical compositions. To unravel the differences and similarities between these two approaches, two types of QDs, namely, CsPbI₃ and CsPbI_2.5Br_0.5 QDs, were synthesized with different sizes but with the same bandgap of 1.85 eV. Aberration-corrected scanning transmission electron microscopy reveals extensive structural defects and nonperovskite phase in mixed-halide QDs, correlating with the nonuniform strain distribution. Pressure-dependent photoluminescence (PL) suggests lower structural stability and distinct lattice distortion in mixed-halide QDs. Furthermore, time-resolved PL and transient absorption measurements indicate longer carrier lifetimes in pure-halide QDs. Finally, the CsPbI₃ QD solar cell delivered an enhanced power conversion efficiency of 16.1% compared with the mixed-halide counterpart (12.8%). This work provides valuable insights into tailoring quantum confinement and composition engineering strategies for achieving QDs with optimal optoelectronic performance.

Original language	English
Pages (from-to)	3970-3981
Number of pages	12
Journal	ACS Energy Letters
Volume	9
Issue number	8
DOIs	https://doi.org/10.1021/acsenergylett.4c01180
State	Published - 9 Aug 2024
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2024 American Chemical Society.

ASJC Scopus subject areas

Chemistry (miscellaneous)
Renewable Energy, Sustainability and the Environment
Fuel Technology
Energy Engineering and Power Technology
Materials Chemistry

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1021/acsenergylett.4c01180

Cite this

Hu, L., Guan, X., Huang, H., Ye, T., Ding, J., Aarti, A., Venkatesan, K., Wang, W., Chen, F., Lin, C. H., Wan, T., Li, M., Yi, J., Zheng, R., Chu, D., Cai, S., Chen, J., Cazorla, C., Yuan, J., ... Huang, S. (2024). Assessing the Optoelectronic Performance of Halide Perovskite Quantum Dots with Identical Bandgaps: Composition Tuning Versus Quantum Confinement. ACS Energy Letters, 9(8), 3970-3981. https://doi.org/10.1021/acsenergylett.4c01180

@article{a979d073fd9f4b178072c9f0f8bfcfaa,

title = "Assessing the Optoelectronic Performance of Halide Perovskite Quantum Dots with Identical Bandgaps: Composition Tuning Versus Quantum Confinement",

abstract = "Halide perovskite quantum dots (QDs) have been considered promising materials for constructing low-cost, high-performing optoelectronics. Tuning their bandgaps can be accomplished through size-dependent quantum confinement or altering chemical compositions. To unravel the differences and similarities between these two approaches, two types of QDs, namely, CsPbI3 and CsPbI2.5Br0.5 QDs, were synthesized with different sizes but with the same bandgap of 1.85 eV. Aberration-corrected scanning transmission electron microscopy reveals extensive structural defects and nonperovskite phase in mixed-halide QDs, correlating with the nonuniform strain distribution. Pressure-dependent photoluminescence (PL) suggests lower structural stability and distinct lattice distortion in mixed-halide QDs. Furthermore, time-resolved PL and transient absorption measurements indicate longer carrier lifetimes in pure-halide QDs. Finally, the CsPbI3 QD solar cell delivered an enhanced power conversion efficiency of 16.1\% compared with the mixed-halide counterpart (12.8\%). This work provides valuable insights into tailoring quantum confinement and composition engineering strategies for achieving QDs with optimal optoelectronic performance.",

author = "Long Hu and Xinwei Guan and Hehe Huang and Tingting Ye and Junfeng Ding and Aarti Aarti and Koushik Venkatesan and Weizhen Wang and Fandi Chen and Lin, \{Chun Ho\} and Tao Wan and Mengyao Li and Jiabao Yi and Rongkun Zheng and Dewei Chu and Songhua Cai and Jiayi Chen and Claudio Cazorla and Jianyu Yuan and Yang Bai and Tom Wu and Shujuan Huang",

note = "Publisher Copyright: {\textcopyright} 2024 American Chemical Society.",

year = "2024",

month = aug,

day = "9",

doi = "10.1021/acsenergylett.4c01180",

language = "English",

volume = "9",

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Hu, L, Guan, X, Huang, H, Ye, T, Ding, J, Aarti, A, Venkatesan, K, Wang, W, Chen, F, Lin, CH, Wan, T, Li, M, Yi, J, Zheng, R, Chu, D, Cai, S, Chen, J, Cazorla, C, Yuan, J, Bai, Y, Wu, T & Huang, S 2024, 'Assessing the Optoelectronic Performance of Halide Perovskite Quantum Dots with Identical Bandgaps: Composition Tuning Versus Quantum Confinement', ACS Energy Letters, vol. 9, no. 8, pp. 3970-3981. https://doi.org/10.1021/acsenergylett.4c01180

TY - JOUR

T1 - Assessing the Optoelectronic Performance of Halide Perovskite Quantum Dots with Identical Bandgaps

T2 - Composition Tuning Versus Quantum Confinement

AU - Hu, Long

AU - Guan, Xinwei

AU - Huang, Hehe

AU - Ye, Tingting

AU - Ding, Junfeng

AU - Aarti, Aarti

AU - Venkatesan, Koushik

AU - Wang, Weizhen

AU - Chen, Fandi

AU - Lin, Chun Ho

AU - Wan, Tao

AU - Li, Mengyao

AU - Yi, Jiabao

AU - Zheng, Rongkun

AU - Chu, Dewei

AU - Cai, Songhua

AU - Chen, Jiayi

AU - Cazorla, Claudio

AU - Yuan, Jianyu

AU - Bai, Yang

AU - Wu, Tom

AU - Huang, Shujuan

PY - 2024/8/9

Y1 - 2024/8/9

N2 - Halide perovskite quantum dots (QDs) have been considered promising materials for constructing low-cost, high-performing optoelectronics. Tuning their bandgaps can be accomplished through size-dependent quantum confinement or altering chemical compositions. To unravel the differences and similarities between these two approaches, two types of QDs, namely, CsPbI3 and CsPbI2.5Br0.5 QDs, were synthesized with different sizes but with the same bandgap of 1.85 eV. Aberration-corrected scanning transmission electron microscopy reveals extensive structural defects and nonperovskite phase in mixed-halide QDs, correlating with the nonuniform strain distribution. Pressure-dependent photoluminescence (PL) suggests lower structural stability and distinct lattice distortion in mixed-halide QDs. Furthermore, time-resolved PL and transient absorption measurements indicate longer carrier lifetimes in pure-halide QDs. Finally, the CsPbI3 QD solar cell delivered an enhanced power conversion efficiency of 16.1% compared with the mixed-halide counterpart (12.8%). This work provides valuable insights into tailoring quantum confinement and composition engineering strategies for achieving QDs with optimal optoelectronic performance.

AB - Halide perovskite quantum dots (QDs) have been considered promising materials for constructing low-cost, high-performing optoelectronics. Tuning their bandgaps can be accomplished through size-dependent quantum confinement or altering chemical compositions. To unravel the differences and similarities between these two approaches, two types of QDs, namely, CsPbI3 and CsPbI2.5Br0.5 QDs, were synthesized with different sizes but with the same bandgap of 1.85 eV. Aberration-corrected scanning transmission electron microscopy reveals extensive structural defects and nonperovskite phase in mixed-halide QDs, correlating with the nonuniform strain distribution. Pressure-dependent photoluminescence (PL) suggests lower structural stability and distinct lattice distortion in mixed-halide QDs. Furthermore, time-resolved PL and transient absorption measurements indicate longer carrier lifetimes in pure-halide QDs. Finally, the CsPbI3 QD solar cell delivered an enhanced power conversion efficiency of 16.1% compared with the mixed-halide counterpart (12.8%). This work provides valuable insights into tailoring quantum confinement and composition engineering strategies for achieving QDs with optimal optoelectronic performance.

UR - https://www.scopus.com/pages/publications/85199545634

U2 - 10.1021/acsenergylett.4c01180

DO - 10.1021/acsenergylett.4c01180

M3 - Article

AN - SCOPUS:85199545634

SN - 2380-8195

VL - 9

SP - 3970

EP - 3981

JO - ACS Energy Letters

JF - ACS Energy Letters

IS - 8

ER -

Assessing the Optoelectronic Performance of Halide Perovskite Quantum Dots with Identical Bandgaps: Composition Tuning Versus Quantum Confinement

Abstract

Bibliographical note

ASJC Scopus subject areas

UN SDGs

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