Enhanced photodetection of perovskite nanoplatelet devices by vertically stacked PEDOT: PSS/PbS/CsPbCl3 architecture

Zhao, Xiuge; Fang, Yongchu; Li, Kai; Tao, Yu; Song, Xiaoxian; Zhang, Haiting; Yu, Huaqing; Wang, Peng

doi:10.1016/j.matlet.2021.129467

Cited by 1 publication

(1 citation statement)

References 14 publications

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“…Meanwhile, the strategy of integrating perovskite with NIR absorption materials (e.g., organic bulk heterojunction (BHJ), lead sulfide quantum dots, etc.) was attempted to expand the spectral response range of PDs to the NIR region 32 – 34 . For example, Chen et al achieved broadband photodetectors with high NIR external quantum efficiency of over 70% in organic-inorganic perovskite/BHJ hybrid 35 .…”

Section: Introductionmentioning

confidence: 99%

A novel approach for designing efficient broadband photodetectors expanding from deep ultraviolet to near infrared

Ding

et al. 2022

Light Sci Appl

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Broadband photodetection (PD) covering the deep ultraviolet to near-infrared (200–1000 nm) range is significant and desirable for various optoelectronic designs. Herein, we employ ultraviolet (UV) luminescent concentrators (LC), iodine-based perovskite quantum dots (PQDs), and organic bulk heterojunction (BHJ) as the UV, visible, and near-infrared (NIR) photosensitive layers, respectively, to construct a broadband heterojunction PD. Firstly, experimental and theoretical results reveal that optoelectronic properties and stability of CsPbI3 PQDs are significantly improved through Er3+ doping, owing to the reduced defect density, improved charge mobility, increased formation energy, tolerance factor, etc. The narrow bandgap of CsPbI3:Er3+ PQDs serves as a visible photosensitive layer of PD. Secondly, considering the matchable energy bandgap, the BHJ (BTP-4Cl: PBDB-TF) is selected as to NIR absorption layer to fabricate the hybrid structure with CsPbI3:Er3+ PQDs. Thirdly, UV LC converts the UV light (200–400 nm) to visible light (400–700 nm), which is further absorbed by CsPbI3:Er3+ PQDs. In contrast with other perovskites PDs and commercial Si PDs, our PD presents a relatively wide response range and high detectivity especially in UV and NIR regions (two orders of magnitude increase that of commercial Si PDs). Furthermore, the PD also demonstrates significantly enhanced air- and UV- stability, and the photocurrent of the device maintains 81.5% of the original one after 5000 cycles. This work highlights a new attempt for designing broadband PDs, which has application potential in optoelectronic devices.

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Section: Introductionmentioning

confidence: 99%

A novel approach for designing efficient broadband photodetectors expanding from deep ultraviolet to near infrared

Ding

et al. 2022

Light Sci Appl

View full text Add to dashboard Cite

show abstract

Enhanced photodetection of perovskite nanoplatelet devices by vertically stacked PEDOT: PSS/PbS/CsPbCl3 architecture

Cited by 1 publication

References 14 publications

A novel approach for designing efficient broadband photodetectors expanding from deep ultraviolet to near infrared

A novel approach for designing efficient broadband photodetectors expanding from deep ultraviolet to near infrared

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