Abstract

While significant progress of electroluminescent (EL) quantum dot light-emitting diodes (QD-LEDs) that rely exclusively on Cd-containing II–VI quantum dots (QDs) has been reported over the past two decades with respect to device processing and performance, devices based on non-Cd QDs as an active emissive layer (EML) remain at the early stage of development. In this work, utilizing highly luminescent colloidal CuInS2 (CIS)/ZnS QDs, all-solution-processed multilayered QD-LEDs are fabricated by sequentially spin depositing a hole transport layer of poly(9-vinlycarbazole), an EML of CIS/ZnS QDs, and an electron transport layer of ZnO nanoparticles. Our focus in device fabrication is to vary the thickness of the QD EML, which is one of the primary determinants in EL performance but has not been addressed in earlier reports. The device with an optimal EML thickness exhibits a peak luminance of 1564cd/m2 and current efficiency of 2.52cd/A. This record value in efficiency is higher by 3–4 times that of CIS QD-LEDs reported previously.

© 2014 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
High-efficiency red electroluminescent device based on multishelled InP quantum dots

Jung-Ho Jo, Jong-Hoon Kim, Ki-Heon Lee, Chang-Yeol Han, Eun-Pyo Jang, Young Rag Do, and Heesun Yang
Opt. Lett. 41(17) 3984-3987 (2016)

High-performance quantum dot light-emitting diodes with hybrid hole transport layer via doping engineering

Qianqian Huang, Jiangyong Pan, Yuning Zhang, Jing Chen, Zhi Tao, Chao He, Kaifeng Zhou, Yan Tu, and Wei Lei
Opt. Express 24(23) 25955-25963 (2016)

Quantum-dot-based white lighting planar source through downconversion by blue electroluminescence

Ki-Heon Lee, Jong-Hoon Kim, Ho Seong Jang, Young Rag Do, and Heesun Yang
Opt. Lett. 39(5) 1208-1211 (2014)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (5)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription