title: Solution-Processed CuInS2-Based White QD-LEDs with Mixed Active Layer Architecture.
abstract: Colloidal quantum dots (QDs) are attractive candidates for future lighting technology. However, in contrast to display applications, the realization of balanced white lighting devices remains conceptually challenging. Here, we demonstrate two-component white light-emitting QD-LEDs with high color rendering indices (CRI) up to 78. The implementation of orange CuInS2/ZnS (CIS/ZnS) QDs with a broad emission and high quantum yield together with blue ZnCdSe/ZnS QDs in a mixed approach allowed white light emission with low blue QD content. The devices reveal only a small color drift in a wide operation voltage range. The correlated color temperature (CCT) could be adjusted between 2200 and 7200 K (from warm white to cold white) by changing the volume ratio between orange and blue QDs (1:0.5 and 1:2).
authors.forename: Svenja
authors.initials: S
authors.lastname: Wepfer
authors.forename: Julia
authors.initials: J
authors.lastname: Frohleiks
authors.affiliation: Materials Architecturing Research Center, Korea Institute of Science and Technology (KIST) , 5, Hwarang-ro 14-gil, Seongbuk-gu, Seoul 02792, Republic of Korea.
authors.forename: A-Ra
authors.initials: AR
authors.lastname: Hong
authors.affiliation: Materials Architecturing Research Center, Korea Institute of Science and Technology (KIST) , 5, Hwarang-ro 14-gil, Seongbuk-gu, Seoul 02792, Republic of Korea.
authors.forename: Ho Seong
authors.initials: HS
authors.lastname: Jang
authors.forename: Gerd
authors.initials: G
authors.lastname: Bacher
authors.forename: Ekaterina
authors.identifier: http://orcid.org/0000-0002-1298-4452
authors.initials: E
authors.lastname: Nannen
keywords: core/shell; light-emitting devices; mixed layer; quantum dots; white