[17p-B410-1~12] 13.8 Optical properties and light-emitting devices

[17p-B410-12] 【Highlighted Presentation】High-yield Synthesis of AgIn_xGa_1−xS₂ Quantum Dots and Spectrally Narrow Green Photoluminescence by GaS_y Shell Coating

〇Taro Uematsu¹, Tatsuya Hirano¹, Tsukasa Torimoto², Susumu Kuwabata¹ (1.Osaka Univ., 2.Nagoya Univ.)

Keywords:quantum dots, cadmium-free, band-edge emission

AgIn_xGa_1−xS₂/GaS_y core/shell quantum dots are cadmium-free quantum dots having green-color emission with a narrow spectral width. Multinary nanomaterial synthesis is difficult to obtain the desired product due to differences in reactivity between the elements. In this study, we obtained the AgIn_xGa_1−xS₂ nanoparticles with a high product yield while maintaining the simplicity of a one-batch reaction. The method consists of the rapid generation of Ag₂S seeds by injecting an Ag source into an activated S source. Subsequently, the incorporation of In, Ga, and S into the preformed Ag₂S nanoparticles generates target AgIn_xGa_1−xS₂ nanoparticles.