Near‐Infrared Organic Phototransistors Based on Thermally Evaporated Planar Heterojunctions Article Swipe
Liye Yang
,
Shuai Sun
,
Liangyu Zhang
,
Muhammad Irfan
,
Mengpei Zhang
,
Paul K. Chu
,
Jiao Yang
,
Jia Li
·
YOU?
·
· 2025
· Open Access
·
· DOI: https://doi.org/10.1002/pssr.202500110
YOU?
·
· 2025
· Open Access
·
· DOI: https://doi.org/10.1002/pssr.202500110
Heterostructures are widely used in organic phototransistors (OPTs) to balance carrier dynamics, including exciton dissociation, transport, and recombination inhibition. Planar heterojunctions (PHJs) offer direct pathways and fewer recombination sites for photo‐induced carriers. However, PHJ‐based OPTs' performance remains unsatisfactory due to challenges in achieving high‐quality organic planar interfaces with uniformity, large area, low roughness, and low defect density. Herein, a PHJ structure is designed for near‐infrared (NIR) photodetection. The PHJ consists of a polymer semiconductor, PDPPBTT, and a fullerene derivative, PC 61 BM. The PDPPBTT acts as the NIR photoactive layer, electron donor, and channel, while PC 61 BM is the acceptor. A simple evaporation technique is developed to deposit the PC 61 BM film on PDPPBTT to form a stable and uniform planar interface. Owing to the balanced dynamic characteristics, highly sensitive NIR photodetection is achieved as demonstrated by peak photosensitivity of 2.59 × 10 4 , photoresponsivity of 1.42 × 10 5 A W −1 , detectivity of 1.83 × 10 16 Jones upon weak irradiation of 0.072 μW cm −2 . To confirm the practicality of NIR imaging, a 7 × 7 array device is demonstrated. The results reveal a simple and effective strategy to prepare high‐performance PHJ‐based OPTs and provide insights into the development of advanced photodetection and imaging systems.
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- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.1002/pssr.202500110
- https://onlinelibrary.wiley.com/doi/pdfdirect/10.1002/pssr.202500110
- OA Status
- bronze
- References
- 31
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W4411494885
All OpenAlex metadata
Raw OpenAlex JSON
- OpenAlex ID
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https://openalex.org/W4411494885Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.1002/pssr.202500110Digital Object Identifier
- Title
-
Near‐Infrared Organic Phototransistors Based on Thermally Evaporated Planar HeterojunctionsWork title
- Type
-
articleOpenAlex work type
- Language
-
enPrimary language
- Publication year
-
2025Year of publication
- Publication date
-
2025-06-20Full publication date if available
- Authors
-
Liye Yang, Shuai Sun, Liangyu Zhang, Muhammad Irfan, Mengpei Zhang, Paul K. Chu, Jiao Yang, Jia LiList of authors in order
- Landing page
-
https://doi.org/10.1002/pssr.202500110Publisher landing page
- PDF URL
-
https://onlinelibrary.wiley.com/doi/pdfdirect/10.1002/pssr.202500110Direct link to full text PDF
- Open access
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YesWhether a free full text is available
- OA status
-
bronzeOpen access status per OpenAlex
- OA URL
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https://onlinelibrary.wiley.com/doi/pdfdirect/10.1002/pssr.202500110Direct OA link when available
- Concepts
-
Photodetection, Heterojunction, Materials science, Optoelectronics, Photodiode, Charge carrier, Planar, Organic semiconductor, Dark current, Photodetector, Computer graphics (images), Computer scienceTop concepts (fields/topics) attached by OpenAlex
- Cited by
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0Total citation count in OpenAlex
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31Number of works referenced by this work
- Related works (count)
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10Other works algorithmically related by OpenAlex
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