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Interfacial high entropy perovskite Ba(Ti0.2Sn0.2Zr0.2Hf0.2Nb0.2)O3 quantum dots for enhanced photoelectric response in CuI/CaTiO3 transparent perovskite pn junction via potential regulation and carrier injection.

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Title: Interfacial high entropy perovskite Ba(Ti0.2Sn0.2Zr0.2Hf0.2Nb0.2)O3 quantum dots for enhanced photoelectric response in CuI/CaTiO3 transparent perovskite pn junction via potential regulation and carrier injection.
Authors: Lv, Xinyan1 (AUTHOR), Yang, Wei1 (AUTHOR), Cai, Zefeng1 (AUTHOR), Cao, Jun1 (AUTHOR), Zheng, Yingying1 (AUTHOR), Wang, Jingjing1 (AUTHOR), Shi, Lei1,2 (AUTHOR), Pan, Jiaqi1 (AUTHOR) panjq@zstu.edu.cn, Liang, Qiang1,3 (AUTHOR) 10333@dzvc.edu.cn, Li, Chaorong1 (AUTHOR) crli@zstu.edu.cn
Source: Ceramics International. Nov2025:Part B, Vol. 51 Issue 27, p53934-53943. 10p.
Subjects: Quantum dots, Photoelectric effect, Perovskite crystallography, Charge transfer, Sol-gel processes, Transparent electronics, Cuprous iodide
Abstract: A transparent pn junction in CuI/Ba(Ti 0.2 Sn 0.2 Zr 0.2 Hf 0.2 Nb 0.2)O 3 quantum dots/CaTiO 3 is synthesized via an approach of sol-gel-sputtering- in situ iodization method. The CuI/BaHEO QDs/CaTiO 3 pn junction achieves high transmittance of ∼85 %, obvious photoelectric enhancement of ∼3.9 × 103-folds to intrinsic CuI/CaTiO 3 (the PCE of ∼1.15 %), decent stability during 6-months. The BaHEO QDs is regarded as the core issue, because besides appropriate Fermi level and high QY, it owns carrier inducing/injecting/driving via B-site Ti-Sn-Zr-Hf-Nb polymetallic ionic metastable state coupling synergism can heighten the dynamic transportation to improve the PCE-transparency balance, including hole inducing by the Cu+/Cu2+ mixed state. Moreover, the CuI owned interfacial contact amelioration and the BaHEO QDs owned interval fillings are beneficial for device stability. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:A transparent pn junction in CuI/Ba(Ti 0.2 Sn 0.2 Zr 0.2 Hf 0.2 Nb 0.2)O 3 quantum dots/CaTiO 3 is synthesized via an approach of sol-gel-sputtering- in situ iodization method. The CuI/BaHEO QDs/CaTiO 3 pn junction achieves high transmittance of ∼85 %, obvious photoelectric enhancement of ∼3.9 × 103-folds to intrinsic CuI/CaTiO 3 (the PCE of ∼1.15 %), decent stability during 6-months. The BaHEO QDs is regarded as the core issue, because besides appropriate Fermi level and high QY, it owns carrier inducing/injecting/driving via B-site Ti-Sn-Zr-Hf-Nb polymetallic ionic metastable state coupling synergism can heighten the dynamic transportation to improve the PCE-transparency balance, including hole inducing by the Cu+/Cu2+ mixed state. Moreover, the CuI owned interfacial contact amelioration and the BaHEO QDs owned interval fillings are beneficial for device stability. [ABSTRACT FROM AUTHOR]
ISSN:02728842
DOI:10.1016/j.ceramint.2025.09.135