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Dual Chalcogen-Bonding Interaction for High-Performance Filterless Narrowband Organic Photodetectors.

Hyeong-Ju KimBongsu KimSungyoung YunDong-Jin YunTaejin ChoiSangjun LeeDaiki MinamiChul-Joon HeoJuhyung LimHiromasa ShibuyaYounhee LimJisoo ShinHyerim HongJeong-Il ParkFeifei FangHwijoung SeoJeoungin YiSangho ParkHyun Hwi LeeKyung-Bae Park
Published in: Small (Weinheim an der Bergstrasse, Germany) (2024)
A novel green-absorbing organic molecule featuring dual intramolecular chalcogen bonds is synthesized and characterized. This molecule incorporates two such bonds: one between a tellurium atom and the oxygen atom of a carbonyl moiety, and the other between the tellurium atom and the adjacent nitrogen atom within a pyridine moiety. The molecule, featuring dual intramolecular chalcogen bonds exhibits a narrow absorption spectrum and elevated absorption coefficients, closely aligned with a resonance parameter of approximately 0.5. This behavior is due to its cyanine-like characteristics and favorable electrical properties, which are a direct result of its rigid, planar molecular structure. Therefore, this organic molecule forming dual intramolecular chalcogen bonds achieves superior optoelectronic performance in green-selective photodetectors, boasting an external quantum efficiency of over 65% and a full-width at half maximum of less than 95 nm while maintaining the performance after 1000 h of heating aging at 85 °C. Such organic photodetectors are poised to enhance stacked organic photodetector-on-silicon hybrid image sensors, paving the way for the next-generation of high-resolution and high-sensitivity image sensors.
Keyphrases
  • molecular dynamics
  • energy transfer
  • high resolution
  • water soluble
  • deep learning
  • photodynamic therapy
  • mass spectrometry
  • electron transfer
  • low cost
  • machine learning
  • quantum dots
  • transition metal