Volume 19, Issue 12 2402077
Research Article

Spin-Deposited Ruddlesden–Popper Polycrystalline Perovskites for Large-Area High-Sensitivity Filterless Narrowband Photodetectors with Ultrafast Response Speed

Lihua Lu

Lihua Lu

School of Electronic Science and Engineering, Xiamen University, Xiamen, 361005 P. R. China

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Ziang Wan

Ziang Wan

School of Electronic Science and Engineering, Xiamen University, Xiamen, 361005 P. R. China

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Zhongli Guo

Zhongli Guo

School of Electronic Science and Engineering, Xiamen University, Xiamen, 361005 P. R. China

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Hongqiang Luo

Hongqiang Luo

School of Electronic Science and Engineering, Xiamen University, Xiamen, 361005 P. R. China

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Yuanyuan Tian

Yuanyuan Tian

School of Electronic Science and Engineering, Xiamen University, Xiamen, 361005 P. R. China

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Sijie Jiang

Sijie Jiang

School of Electronic Science and Engineering, Xiamen University, Xiamen, 361005 P. R. China

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Yikai Yun

Yikai Yun

School of Electronic Science and Engineering, Xiamen University, Xiamen, 361005 P. R. China

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Hailong Hu

Hailong Hu

School of Electronic Science and Engineering, Xiamen University, Xiamen, 361005 P. R. China

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Sijia Zhou

Sijia Zhou

School of Electronic Science and Engineering, Xiamen University, Xiamen, 361005 P. R. China

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Mengyu Chen

Corresponding Author

Mengyu Chen

School of Electronic Science and Engineering, Xiamen University, Xiamen, 361005 P. R. China

Future Display Institute of Xiamen, Xiamen, 361005 P. R. China

E-mail: [email protected]

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Cheng Li

Cheng Li

School of Electronic Science and Engineering, Xiamen University, Xiamen, 361005 P. R. China

Future Display Institute of Xiamen, Xiamen, 361005 P. R. China

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Rong Zhang

Rong Zhang

Future Display Institute of Xiamen, Xiamen, 361005 P. R. China

Fujian Key Laboratory of Semiconductor Materials and Applications, CI Center for OSED, Department of Physics and Engineering Research Center of Micro-Nano Optoelectronic Materials and Devices, Ministry of Education, Xiamen University, Xiamen, 361005 P. R. China

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First published: 17 March 2025

Abstract

Filterless perovskite narrowband photodetectors (PNPDs) are highly demanded in color and spectral discrimination, which are typically demonstrated by charge collection narrowing (CCN) effect of perovskite single crystals, showing a limited sensing area and slow response speed. Here, fast-response, high-sensitivity PNPDs are demonstrated using spin-deposited polycrystalline 2D (poly-2D) Ruddlesden–Popper (RP) perovskite films with thickness of ≈3.6 µm. The strong narrowband excitonic light absorption and limited charge diffusion length of poly-2D RP perovskites enable a favored long-wavelength response and a significant suppression of short-wavelength response to further strengthen the CCN effect. In particular, the photodetection properties, as well as the spectral rejection ratio and central response wavelength, can be finely tuned with an alkyl chain length of the spacer cations. The optimized devices achieve a narrow spectral response with a full-width at half-maximum of 12.7 nm, a record high peak specific detectivity of 1.09 × 1012 Jones and ultrafast response speed with rise/fall times of 5.6/11.5 µs, which outperform the published similar PNPDs. Moreover, a spin-deposited large-area sensing array with 6 × 6 PNPDs is fabricated with high consistency, for efficient color and shape discrimination demonstrations. This facile and versatile approach sheds light on the practical applications of large-area high-performance filterless PNPDs.

Conflict of Interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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