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  • 02월 19일 10시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

대한화학회 제121회 학술발표회 및 총회 Transition metal-doped CuInS2 for white Light-emitting diode application

2018년 2월 13일 15시 13분 32초
INOR.P-208 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
4월 19일 (목요일) 11:00~12:30
Inorganic Chemistry
저자 및
Shul-GI Park, Kwangyeol Lee, Ho Seong Jang1,*
Department of Chemistry, Korea University, Korea
1Korea Institute of Science and Technology, Korea
Down-converted quantum dots (QDs) have been extensively studied for past three decades since the report on the synthesis of high-quality colloidal CdE (E = S, Se, Te). The CdE QDs show high quantum yield (QY), but they are toxic due to the presence of Cd. For that reason, the need for environmentally-friendly QDs without Cd is emerging. In this study, we synthesized Cd-free CuInS2-based QDs that they showed broad emission under blue light excitation. The transition metal was doped to control the emission band. Then doped CuInS2 QDs exhibited high QY and broad emission with full width at half maximum wider than 110 nm. In order to increase of QY, we synthesized CuInS2 QDs with core/shell/shell structure. The core/shell/shell QDs showing broad and bright emission are suitable to be applied to blue light-emitting diode (LED)-pumped white LEDs (WLEDs). In this study, white LEDs using core/shell/shell QDs were fabricated. We confirmed CuInS2 QDs by elemental analysis using an electron microscope and investigated the optical properties of the transition metal-doped CuInS2 QDs. Finally, optical properties of WLED were investigated. (1) Murray, C. B.; Norris, D. J.; Bawendi, M. G. Synthesis and Characterization of Nearly Monodisperse CdE (E = Sulfur, Selenium, Tellurium) Semiconductor Nanocrystallites. J. Am. Chem. Soc. 1993, 115, 8706-8715.