Synthesis and Application of AgBiS2 and Ag2S Nanoinks for the Production of IR Photodetectors

Tatsuya Nakazawa; Donghyun Kim; Yusuke Oshima; Hiroki Sato; Jusang Park; Hyungjun Kim

doi:10.1021/acsomega.1c03463

Synthesis and Application of AgBiS₂ and Ag₂S Nanoinks for the Production of IR Photodetectors

ACS Omega. 2021 Aug 2;6(31):20710-20718. doi: 10.1021/acsomega.1c03463. eCollection 2021 Aug 10.

Authors

Tatsuya Nakazawa^{1

2}, Donghyun Kim¹, Yusuke Oshima³, Hiroki Sato³, Jusang Park¹, Hyungjun Kim¹

Affiliations

¹ School of Electrical and Electronic Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, Republic of Korea.
² Metallic Materials Development Department, TANAKA KIKINZOKU KOGYO K.K., Isehara Technical Center, 28 Suzukawa, Isehara, Kanagawa 259-1146, Japan.
³ Chemical Materials Development Department, TANAKA KIKINZOKU KOGYO K.K., Tsukuba Technical Center, 22 Wadai, Tsukuba, Ibaraki 300-4247, Japan.

Abstract

Nanoinks composed of quantum dots (QDs) are applied in light-receiving devices and light-emitting devices such as solar cells and displays. However, since the most widely used QDs, PbS and CdS, are toxic and environmentally concerning, alternative materials need to be developed. We synthesized and analyzed Ag chalcogenide nanoparticles, including AgBiS₂ and Ag₂S nanoparticles, which are eco-friendly materials. AgBiS₂ and Ag₂S QD films were prepared by spin-coating nanoparticle solutions and subsequent heat treatment. The effects of the heat treatment on residual ligands and photoluminescence were determined by surface analysis. The photocurrent response of the AgBiS₂ and Ag₂S QD films was measured in the near-infrared region, and the effect of the heat treatment temperature was investigated. The results indicate that AgBiS₂ and Ag₂S are prospective materials for near-infrared photodetectors.