TY - JOUR
T1 - Exploring the Structural Origins of Optically Efficient One-Dimensional Lead Halide Perovskite Nanostructures
AU - Oddo, Alexander M.
AU - Chabeda, Daniel
AU - Basu, Jaydeep
AU - Arnold, Marcel
AU - Song, Chengyu
AU - Rabani, Eran
AU - Yang, Peidong
N1 - Publisher Copyright:
© 2025 American Chemical Society.
PY - 2025/3/26
Y1 - 2025/3/26
N2 - Metal halide perovskites have excellent optoelectronic properties. This study aims to determine how the optoelectronic properties of a model perovskite, cesium lead bromide (CsPbBr3), change with length and thickness in one dimension (1D). By examining the photophysics of CsPbBr3 quantum dots (QDs), nanowires (NWs), and nanorods (NRs), we observe the influence of confinement, exciton diffusion, and trapping on their optical properties. Our findings reveal that exciton diffusion to trap states limits the photoluminescence quantum yield (PLQY) of 1D CsPbBr3 in the weakly confined regime (8-14 nm) and explains their long-lived exciton dynamics, while enhanced radiative rates contribute to achieving near-unity PLQY in the strongly confined regime (<7 nm). Consequently, blue-emitting, 2.4 nm-thick CsPbBr3 NRs were 3.6X more emissive than the conventional CsPbBr3 QDs. This study underscores how structural optimization can improve the optoelectronic performance of CsPbBr3 and provides insight into the complex interplay of radiative and nonradiative processes in 1D ionic semiconductors.
AB - Metal halide perovskites have excellent optoelectronic properties. This study aims to determine how the optoelectronic properties of a model perovskite, cesium lead bromide (CsPbBr3), change with length and thickness in one dimension (1D). By examining the photophysics of CsPbBr3 quantum dots (QDs), nanowires (NWs), and nanorods (NRs), we observe the influence of confinement, exciton diffusion, and trapping on their optical properties. Our findings reveal that exciton diffusion to trap states limits the photoluminescence quantum yield (PLQY) of 1D CsPbBr3 in the weakly confined regime (8-14 nm) and explains their long-lived exciton dynamics, while enhanced radiative rates contribute to achieving near-unity PLQY in the strongly confined regime (<7 nm). Consequently, blue-emitting, 2.4 nm-thick CsPbBr3 NRs were 3.6X more emissive than the conventional CsPbBr3 QDs. This study underscores how structural optimization can improve the optoelectronic performance of CsPbBr3 and provides insight into the complex interplay of radiative and nonradiative processes in 1D ionic semiconductors.
UR - http://www.scopus.com/inward/record.url?scp=86000634152&partnerID=8YFLogxK
U2 - 10.1021/jacs.4c18320
DO - 10.1021/jacs.4c18320
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C2 - 40073387
AN - SCOPUS:86000634152
SN - 0002-7863
VL - 147
SP - 10466
EP - 10474
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
IS - 12
ER -
