Dual-Band, High-Performance Phototransistors from Hybrid Perovskite and Organic Crystal Array for Secure Communication Applications
Abstract
High-performance phototransistors made from organic semiconductor single crystals (OSSCs) have attracted much attention due to the high responsivity and solution-processing capability of OSSCs. However, OSSC-based phototransistors capable of dual-band spectral response remain a difficult challenge to achieve because organic semiconductors usually possess only narrow single-band absorption. Here, we report the fabrication of high-performance, dual-band phototransistors from a hybrid structure of a 2,7-dioctyl[1]benzothieno[3,2- b ][1]benzothiophene (C8-BTBT) single-crystal array coated with CH 3 NH 3 PbI 3 nanoparticles (NPs) synthesized by a simple, one-step solution method. In contrast to C8-BTBT and CH 3 NH 3 PbI 3 NPs with respective absorption in the ultraviolet (UV) and visible (vis) region, their hybrid structure shows broad absorption covering the entire UV–vis range. The hybrid-based phototransistors exhibit an ultrahigh responsivity of >1.72 × 10 4 A/W in the 252–780 nm region, which represents the best performance for solution-processing, broadband photodetectors. Moreover, integrated phototransistor circuitries from the hybrid CH 3 NH 3 PbI 3 NPs/C8-BTBT single-crystal array show applications for high-security communication.
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The method ensures high-performance photodetectors with a responsivity of 13.5 A/W, a detection limit of 1 μW/cm2, and over 50 days of stability in air.
“The method ensures high-performance photodetectors with a responsivity of 13.5 A/W, a detection limit of 1 μW/cm 2 , and over 50 days of stability in air.”
From Design Strategies and Emerging Applications of Perovskite-Based Sensors (2025) · cites this paper as [176]
Xu et al. developed a dual-band phototransistor-based image sensor using a C8-BTBT organic semiconductor single-crystal array coated with MAPbI3 perovskite nanoparticles.
“Xu et al. [176] developed a dual-band phototransistor-based image sensor using a 2,7dioctyl[1]-benzothieno[3,2-b][1]benzothiophene (C8-BTBT) organic semiconductor single-crystal array coated with MAPbI 3 perovskite nanoparticles.”
From Design Strategies and Emerging Applications of Perovskite-Based Sensors (2025) · cites this paper as [176]
The process is compatible with flexible substrates, producing durable photodetectors suitable for high-resolution, flexible image sensors.
“The process is compatible with flexible substrates, producing durable photodetectors suitable for highresolution, flexible image sensors (Figure 11B).”
From Design Strategies and Emerging Applications of Perovskite-Based Sensors (2025) · cites this paper as [176]
The hybrid phototransistor exhibited an extended photoresponse across the UV-visible range, compared to the single-band response of the pure C8-BTBT phototransistor, due to efficient carrier transfer between C8-BTBT and MAPbI3.
“The hybrid phototransistor exhibited an extended photoresponse across the UV-visible range, compared to the singleband response of the pure C8-BTBT phototransistor, due to efficient carrier transfer between C8-BTBT and MAPbI 3 (Figure 11A).”
From Design Strategies and Emerging Applications of Perovskite-Based Sensors (2025) · cites this paper as [176]
Cites
Deng, W., Zhang, X., Huang, L., Xu, X., Wang, L., Wang, J., Shang, Q., Lee, S., & Jie, J. (2016) · Advanced Materials · doi:10.1002/adma.201505126 · Cited by 432 · see citing works
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Recent Advances in Perovskite Photodetectors for Image Sensing
Li, L., Ye, S., Qu, J., Zhou, F., Song, J., & Shen, G. (2021) · Small · doi:10.1002/smll.202005606 · Cited by 235 · see citing works
Design Strategies and Emerging Applications of Perovskite-Based Sensors
Li, Y., Ding, Y., Sun, J., Tan, S., Li, Y., Wang, X., Cai, J., Bai, J., Lv, X., Guo, W., et al. (2025) · SmartMat · doi:10.1002/smm2.70022 · Cited by 41 · see citing works
- Authors
- Xu, X., Deng, W., Zhang, X., Huang, L., Wang, W., Jia, R., Wu, D., Zhang, X., Jie, J., & Lee, S.-T.
- Affiliations
- Soochow University (CN)
- Zhengzhou University (CN)
- Corresponding author
- Zhang, Xiujuan
- Jie, Jiansheng
- Lee, Shuit-Tong
- ORCID
- Venue
- ACS Nano
- Publisher
- American Chemical Society (ACS)
- Published
- 2019-05-08
- Volume
- 13
- Issue
- 5
- Pages
- 5910-5919
- ISSN
- 1936-0851 (ISSN-L)
- 1936-086X
- OpenAlex
- W2944204244
- Cited by
- 98
- References
- 1
- Citations by year
- 2026: 3 · 2025: 13 · 2024: 15 · 2023: 16 · 2022: 15 · 2021: 20 · 2020: 15 · 2019: 1
- FWCI
- 4.58
- Type
- journal article
- Language
- en
- Open access
- closed
- Licence
- Locations
- ACS Nano (publishedVersion)
- PubMed (publishedVersion)
- Funders
- State Administration of Foreign Experts Affairs
- Ministry of Science and Technology of the People's Republic of China (2016YFA0202400)
- Ministry of Education of the People's Republic of China
- Natural Science Foundation of Jiangsu Province (BK20180845)
- Government of Jiangsu Province
- National Natural Science Foundation of China (21673151, 51622306, 51821002, 91833303, 51672180)
- Collaborative Innovation Center of Suzhou Nano Science and Technology
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- Topics
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Organic Electronics and Photovoltaics
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Perovskite Materials and Applications
- Physical Sciences › Materials Science › Materials Chemistry › 2D Materials and Applications
- Keywords
- phototransistor, perovskite nanocrystals, methylammonium lead iodide, C8-BTBT, dual-band photodetection, broadband absorption, solution-processed photodetectors, secure optical communication
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