Simultaneous low-order phase suppression and defect passivation for efficient and stable blue light emitting diodes

Wallace C. H. Choy

doi:10.1117/12.2595122

1 August 2021 Simultaneous low-order phase suppression and defect passivation for efficient and stable blue light emitting diodes

Wallace C. H. Choy

Author Affiliations +

Proceedings Volume 11808, Organic and Hybrid Light Emitting Materials and Devices XXV; 118080X (2021) https://doi.org/10.1117/12.2595122
Event: SPIE Organic Photonics + Electronics, 2021, San Diego, California, United States

Abstract

Quasi-2D perovskite is considered as a promising candidate for blue perovskite light emitting diode (PeLEDs). However, the wide distribution of low-order phases, inefficient energy transfer, and defects/traps increase the non-radiative recombination, further aggravating PeLED external quantum efficiency (EQE). We demonstrate a unique quasi-2D perovskite with low-order phase suppression and defect passivation by incorporating a 2D perovskite and an excess ammonium salt into the quasi-2D perovskite. By optimizing the new quasi-2D perovskites, we achieve blue PeLEDs with brightness 1765 cd m-2, EQE 7.51%, low turn-on voltage 3.07 V, and long operation lifetime 3961 sec without any shift in electroluminescent spectra.

Conference Presentation

Citation Download Citation

Wallace C. H. Choy "Simultaneous low-order phase suppression and defect passivation for efficient and stable blue light emitting diodes", Proc. SPIE 11808, Organic and Hybrid Light Emitting Materials and Devices XXV, 118080X (1 August 2021); https://doi.org/10.1117/12.2595122

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available