Robust Imaging through Light‐Scattering Barriers via Energetically Modulated Multispectral Organic Photodetectors
Emerging technologies, such as biomedical imaging and autonomous driving, rely on low-noise near infrared (NIR) photodetectors. Organic photodetectors (OPDs) offer tremendous potential for these applications because of their seamless integration and NIR photosensing capabilities; however, their high noise levels have constrained widespread commercialization. Herein, the study demonstrates a bulk heterojunction (BHJ) NIR OPD featuring an ultralow noise current of 2.18 fA, enabled by a newly synthesized electron-blocking layer (EBL), ((2,7-dicyano-9H-fluorene-9,9-diyl)bis(propane-3,1-diyl))bis(phosphonic acid) (3PAFCN). Through diverse energetic modulative design strategies, 3PAFCN enables the OPD to achieve homogenous surface properties, an elevated interfacial energy barrier, and optimized BHJ morphology, culminating in a notable specific detectivity of 2.50 × 10<sup>14</sup> cm Hz<sup>0.5</sup> W<sup>-1</sup> at 808 nm illumination under white-noise conditions. These EBL design principles are broadly applicable for various photoactive materials. Demonstrations in single-pixel imaging highlight the exceptional clarity of the 3PAFCN-based OPD in low-light and foggy environments, underscoring the potential of OPD technology for advanced imaging applications.
Authors
- Min‐Chul Park (ORCID: https://orcid.org/0000-0002-8575-085X)
- Dong Hee Park (ORCID: https://orcid.org/0000-0001-8547-1829)
- Kwang‐Hoon Lee
- Gyoung Yong Lee
- Eun Soo Shim
- Byung Ku Jung (ORCID: https://orcid.org/0000-0002-5080-0757)
- Seon Kyu Yoon (ORCID: https://orcid.org/0000-0002-5050-4675)
- Jea Woong Jo (ORCID: https://orcid.org/0000-0001-8086-2644)
- Tae Hyuk Kim (ORCID: https://orcid.org/0000-0002-7975-2437)
- Sae Youn Lee (ORCID: https://orcid.org/0000-0003-2163-2333)
- Soong Ju Oh (ORCID: https://orcid.org/0000-0003-1434-8844)
- Seunghyun Oh (ORCID: https://orcid.org/0009-0005-6026-7254)
- Gyeong Min Lee
- Sanghyun Lee (ORCID: https://orcid.org/0000-0002-0395-207X)
- Jae Won Shim (ORCID: https://orcid.org/0000-0001-8387-160X)
- Hyun Woo Ko
- Byeong‐Gyu Chae
- Ji Hyeon Lee
- Hyungju Ahn
- Suyeon Jo
- Paul Hongsuck Seo
Institutions
- Pohang University of Science and Technology (KR)
- Korea University (KR)
- Dongguk University (KR)
- Korea Photonics Technology Institute (KR)
- Pohang Accelerator Laboratory
- Korea Institute of Science and Technology (KR)
Publication Details
- Journal
- Advanced Materials
- Published
- 2025-04-24
- DOI
- https://doi.org/10.1002/adma.202503868
- Citations
- 13
- Primary Topic
- Luminescence and Fluorescent Materials
- Type
- article
- Field-Weighted Citation Impact
- 6.73
Funders
- National Research Foundation
- Ministry of Trade, Industry and Energy
- Korea Institute of Science and Technology
- National Research Foundation of Korea
- Korea Creative Content Agency
- Ministry of Science and ICT, South Korea
- Institute for Information and Communications Technology Promotion