Oh, Seunghyun Jo, Suyeon Lee, Ji Hyeon Ko, Hyun Woo Kim, Tae Hyuk Seo, Paul Hongsuck Lee, Gyeong Min Shim, Eun Soo Ahn, Hyungju Jung, Byung Ku Oh, Soong Ju Park, Donghee Lee, Kwang-Hoon Yoon, Seon Kyu Chae, Byeonguk Lee, Sanghyun Lee, Gyoung Yong Jo, Jea Woong Lee, Sae Youn Park, Min-Chul Shim, Jae Won 2025-05-09T06:00:29Z 2025-05-09T06:00:29Z 2025-05-07 2025-07 0935-9648 https://pubs.kist.re.kr/handle/201004/152384 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 x 1014 cm Hz0.5 W-1 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. English WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim Robust Imaging through Light-Scattering Barriers via Energetically Modulated Multispectral Organic Photodetectors Article 10.1002/adma.202503868 1 Advanced Materials, v.37, no.28 Advanced Materials 37 28 Y scie scopus 001473347600001 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Science & Technology - Other Topics Materials Science Physics Article PEROVSKITE SOLAR-CELLS PHOTODIODES RECOMBINATION EFFICIENCY CHARGE INJECTION organic photodetectors photonics self-assembled monolayers electron blocking layers