Solution-Processed CuInS2-Based White QD-LEDs with Mixed Active Layer Architecture

Title
Solution-Processed CuInS2-Based White QD-LEDs with Mixed Active Layer Architecture
Authors
장호성홍아라Svenja WepferJulia FrohleiksGerd BacherEkaterina Nannen
Keywords
quantum dots; Cd-free; CuInS2; core/shell; display; QLEDs
Issue Date
2017-03
Publisher
ACS Applied Materials & Interfaces
Citation
VOL 9, NO 12-11230
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).
URI
http://pubs.kist.re.kr/handle/201004/69668
ISSN
1944-8244
Appears in Collections:
KIST Publication > Article
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