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8 results on '"Si, Min-Jae"'

3. Silver Telluride Colloidal Quantum Dot Solid for Fast Extended Shortwave Infrared Photodetector.

Author

Ahn, Yongnam, Eom, So Young, Kim, Gahyeon, Lee, Jin Hyeok, Kim, Beomkwan, Kim, Dongeon, Si, Min‐Jae, Yang, Minjung, Jung, Yujin, Kim, Bo Seon, Chung, Yoon Jang, Jeong, Kwang Seob, and Baek, Se‐Woong

Subjects
SEMICONDUCTOR nanocrystals, NIGHT vision, COLLOIDAL silver, CARRIER density, CHARGE carrier mobility
Abstract

Extended shortwave infrared (eSWIR) photodetectors that employ solution‐processable semiconductors have attracted attention for use in applications such as ranging, night vision, and gas detection. Colloidal quantum dots (CQDs) are promising materials with facile bandgap tunability across the visible‐to‐mid‐infrared wavelengths. However, toxic elements, such as Hg and Pb, and the slow response time of CQD‐based IR photodetectors, limit their commercial viability. This article presents a novel eSWIR photodetector that is fabricated using silver telluride (Ag2Te) CQDs. Effective thiolate ligand exchange enables a lower trap density and improved carrier mobility in CQD solids. Furthermore, a vertical p‐n photodiode architecture with a favorable energy‐level landscape is utilized to facilitate charge extraction, resulting in a fast, room‐temperature‐operable, and toxic‐element‐free CQD photodetector. The best eSWIR Ag2Te CQD photodetector exhibits a fall time of 72 ns, representing the fastest response time among all prior CQD‐based eSWIR photodetectors, including those containing toxic elements, such as Pb and Hg. [ABSTRACT FROM AUTHOR]

Published
2024
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5. Multi‐Facet Passivation of Ternary Colloidal Quantum Dot Enabled by Quadruple‐Ligand Ensemble toward Efficient Lead‐Free Optoelectronics (Adv. Energy Mater. 7/2024)

Author

Kim, Dongeon, primary, Cho, Gaeun, additional, Kim, Yun Hoo, additional, Kwon, Ji Hyun, additional, Oh, Yeonwoo, additional, Yang, Minjung, additional, Jee, Seungin, additional, Lee, In Suh, additional, Si, Min‐Jae, additional, Jung, Yujin, additional, Yang, Ho Yeon, additional, Ahn, Yongnam, additional, Kim, Beom‐Kwan, additional, Kim, Changjo, additional, Kim, Han Seul, additional, and Baek, Se‐Woong, additional

Published
2024
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