Improved Efficiency and Enhanced Color Quality of Light-Emitting Diodes with Quantum Dot and Organic Hybrid Tandem Structure

Zhang, Heng; Feng, Yuanxiang; Chen, Shuming

2016-10-12

10.1021/acsami.6b07303

ACS Applied Materials & Interfaces   影响因子和分区

1944-8244

Light-emitting diodes based on organic (OLEDs) and colloidal quantum dot (QLEDs) are widely considered as next-generation display technologies because of their attractive advantages such as self-emitting and flexible form factor. The OLEDs exhibit relatively high efficiency, but their color saturation is quite poor compared with that of QLEDs. In contrast, the QLEDs show very pure color emission, but their efficiency is lower than that of OLEDs currently. To combine the advantages and compensate for the weaknesses of each other, we propose a hybrid tandem structure which integrates both OLED and QLED in a single device architecture. With ZnMgO/Al/HATCN interconnecting layer, hybrid tandem LEDs are successfully fabricated. The demonstrated hybrid tandem devices feature high efficiency and high color saturation simultaneously; for example, the devices exhibit maximum current efficiency and external quantum efficiency of 96.28 cd/A and 25.90%, respectively. Meanwhile, the full width at half-maximum of the emission spectra is remarkably reduced from 68 to 44 nm. With the proposed hybrid tandem structure, the color gamut of the displays can be effectively increased from 81% to 100% NTSC. The results indicate that the advantages of different LED technologies can be combined in a hybrid tandem structure.

tandem structure organic light-emitting diodes quantum dot light-emitting diodes color purity interconnecting layer

SCI ; EI

英语

第一 ; 通讯

National Key Research and Development Program of China[2016YFB0401702]

Science & Technology - Other Topics ; Materials Science

Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:000385469000063

AMER CHEMICAL SOC

20164302931053

Color ; Diodes ; Efficiency ; Emission spectroscopy ; Flexible displays ; Nanocrystals ; Quantum efficiency ; Semiconductor quantum dots

Semiconductor Devices and Integrated Circuits:714.2 ; Computer Peripheral Equipment:722.2 ; Light/Optics:741.1 ; Nanotechnology:761 ; Production Engineering:913.1 ; Quantum Theory; Quantum Mechanics:931.4

Web of Science

Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China

Zhang, Heng,Feng, Yuanxiang,Chen, Shuming. Improved Efficiency and Enhanced Color Quality of Light-Emitting Diodes with Quantum Dot and Organic Hybrid Tandem Structure[J]. ACS Applied Materials & Interfaces,2016,8(40):26982-26988.

Zhang, Heng,Feng, Yuanxiang,&Chen, Shuming.(2016).Improved Efficiency and Enhanced Color Quality of Light-Emitting Diodes with Quantum Dot and Organic Hybrid Tandem Structure.ACS Applied Materials & Interfaces,8(40),26982-26988.

Zhang, Heng,et al."Improved Efficiency and Enhanced Color Quality of Light-Emitting Diodes with Quantum Dot and Organic Hybrid Tandem Structure".ACS Applied Materials & Interfaces 8.40(2016):26982-26988.