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학술지 Luminance Compensation in Top-emitting Organic Light-emitting Diodes with High Color Purity as Quantum Dots using Horizontal Dipole Orientation
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저자
조현수, 강찬모, 권병화, 최수경, 주철웅, 이현구
발행일
202012
출처
Organic Electronics, v.87, pp.1-7
ISSN
1566-1199
출판사
Elsevier
DOI
https://dx.doi.org/10.1016/j.orgel.2020.105945
협약과제
20PB2200, 수평분자 배열 극대화를 이용한 고효율/장수명 청색발광 소재‧소자 기술개발, 조현수
초록
Organic light-emitting diodes (OLEDs) and quantum dots (QDs) are mainstream applications in large-sized displays. Owing to their narrow photoluminescence (PL), QDs offer a wide color gamut. Although OLEDs have a wider PL spectrum bandwidth than that of QDs, a high color purity can be obtained through an optical design of the top-emitting device. However, the luminance improvement from the strong cavity effect in a top-emitting geometry is not significant because of the wide PL spectrum. This insufficient luminance improvement can be compensated by applying organic light-emitting materials with horizontally oriented dipoles. Luminance compensation is color dependent. In a blue light-emitting structure, the luminance improvement by a narrow PL spectrum is more advantageous than by a horizontal dipole orientation. However, in green and red light-emitting structures, even if the full width at half maximum of the PL is about 20-nm-wide, luminance can be compensated using a horizontal dipole orientation while maintaining high color purity.
키워드
Color purity, Horizontal dipole orientation, Organic light-emitting diode, Quantum dot, Top-emitting
KSP 제안 키워드
Blue light-emitting, Dipole orientation, Full-width at half-maximum(FWHM), Light-emitting materials, Organic light-emitting diodes(OLEDS), PL spectrum, Quantum Dot(QD), Red light, Wide Color Gamut, high color purity, horizontal dipole