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J. Korean Ceram. Soc. > Volume 58(6); 2021 > Article
Journal of the Korean Ceramic Society 2021;58(6): 631-644.
doi: https://doi.org/10.1007/s43207-021-00141-5
Photosensors‑based on cadmium sulfide (CdS) nanostructures: a review
Byung‑Gi An1,2, Hong‑Rae Kim1, Young Wook Chang1, Jae‑Gwan Park3, Jae‑Chul Pyun1
1Department of Materials Science and Engineering, Yonsei University, 50 Yonsei-Ro, Seodaemun-Gu, Seoul 03722, Republic of Korea
2Camera Module R&D Team, Samsung Electro-Mechanics Co., Ltd., Suwon 44610, Republic of Korea
3Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
Correspondence  Jae‑Chul Pyun ,Email: jcpyun@yonsei.ac.kr
Received: June 27, 2021; Revised: August 12, 2021   Accepted: August 18, 2021.  Published online: November 30, 2021.
ABSTRACT
Cadmium sulfide (CdS) is an II–VI semiconductor with a direct bandgap of 2.4 eV; it has been used for various applications, such as nonlinear optical devices, fat-panel displays, light-emitting diodes, lasers, logic gates, transistors, photoresistors, solar cells, infrared waveguides, and splitters. CdS nanostructures have been synthesized through two different routes: (1) vapor-phase growth and (2) liquid-phase growth. The vapor-phase growth system can yield highly pure single-crystal nanostructures, and liquid-phase growth has been carried out through chemical or electrochemical reactions in solution with templates. The fabricated nanostructures of CdS showed a relatively low work function, high refractive index, excellent transport properties, good chemical capability, thermal stability, high electronic mobility, and piezoelectric properties. For these reasons, CdS photosensors have been produced using various nanostructures of CdS, such as nanorods, nanoribbons, and nanowires. For the fabrication of CdS nanowire photosensors, many different approaches have been demonstrated to connect nanostructures in devices and circuits using various techniques, such as dry transfer, wet transfer, and contact printing. Each method has practical advantages and drawbacks in the implementation of nanostructures in devices. In this article, the synthesis of CdS nanostructures and the fabrication of photosensors based on the CdS nanostructures are reviewed.
Key words: CdS · Nanowire photosensor · Nanowire synthesis · Fabrication
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