화학공학소재연구정보센터
학회 한국공업화학회
학술대회 2016년 가을 (10/26 ~ 10/28, 제주국제컨벤션센터(ICCJEJU))
권호 20권 2호
발표분야 (무기재료) 페로브스카이트 나노소재 다기능 응용 기술
제목 하이브리드 페로브스카이트 나노소재의 다기능 응용
초록 We report the reduced-dimensionality perovskite films that exhibit improved stability in solar cell performance while retaining the high performance of conventional three-dimensional perovskites. We achieve the first certified hysteresis-free solar power conversion in a planar perovskite solar cell, obtaining a 15.3% PCE, and observe greatly improved performance longevity. We also report a perovskite mixed material, comprised of a series of differently quantum-size-tuned grains, that funnels photoexcitations to the lowest-bandgap light-emitter in the mixture. The materials function as charge carrier concentrators, ensuring that radiative recombination successfully outcompetes trapping and hence nonradiative recombination. We use the new material to build devices that exhibit an external quantum efficiency of 8.8% and a radiance of 80 Wsr-1m-2. These represent the brightest and most efficient solution-processed near-infrared LEDs to date.
저자 김동하
소속 이화여자대
키워드 perovskite; solar cell; photovoltaics; light emitting diode; display
E-Mail dhkim@ewha.ac.kr