Stoichiometric Engineering of Ag2S Nanocrystals to Realize High Performance for Organic–Inorganic Hybrid Photodiodes
SCIE
SCOPUS
- Title
- Stoichiometric Engineering of Ag2S Nanocrystals to Realize High Performance for Organic–Inorganic Hybrid Photodiodes
- Authors
- Sim, Kyu Min; Kwon, Jisu; Ma, Jinhyuk; Pyo, Won Jun; Kim, Dowan; Sung, Yunmo; Nam, Sang Yong; Joo, Taiha; KIM, SUNG JEE; CHUNG, DAE SUNG
- Date Issued
- 2024-05
- Publisher
- American Chemical Society
- Abstract
- Organic-inorganic hybrid photodiodes (HPDs) have the potential to revolutionize optoelectronic devices for a brand-new technology. HPDs combining polymeric semiconductors and nanocrystals (NCs) have demonstrated their ability to amplify signals by trapping electrons within ligand-capped NCs. The performance of HPDs is dependent on their ability to capture minority carriers for the continuous tunneling injection of majority carriers. To achieve this, heavy-metal-free Ag2S NCs were synthesized with stoichiometric engineering for HPDs. The surface stoichiometry of the NCs was analyzed using time-resolved photoluminescence and space-charge-limited current analyses and elemental analyses. The fine-tuning of the surface stoichiometry of Ag2S NCs enables high external quantum efficiency (EQE) of the HPDs. The optimized HPDs demonstrated a high peak EQE of 170,000% and specific detectivity of 3 × 1013 Jones. Control of NC stoichiometry is vital for the photophysical properties of sensitizing centers, which guarantees successful applications of HPDs to optoelectronic devices.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/123911
- DOI
- 10.1021/acs.jpcc.4c02154
- ISSN
- 1932-7447
- Article Type
- Article
- Citation
- The Journal of Physical Chemistry C, vol. 128, no. 20, page. 8540 - 8548, 2024-05
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