PMID- 34614901
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20211007
IS  - 1094-4087 (Electronic)
IS  - 1094-4087 (Linking)
VI  - 29
IP  - 16
DP  - 2021 Aug 2
TI  - Design and fabrication of hybrid MLAs/gratings for the enhancement of light 
      extraction efficiency and distribution uniformity of OLEDs.
PG  - 25812-25823
LID - 10.1364/OE.427258 [doi]
AB  - Extracting light from organic light-emitting diodes (OLEDs) and improving the 
      angular distribution are essential for their commercial applications in 
      illumination and displays. In this work, hybrid microlens arrays (MLAs) and 
      gratings with periods and depths in the scale of submicron have been designed and 
      incorporated on the lighting surface of OLEDs for simultaneous enhancement of 
      light outcoupling efficiency and angular distribution improvement. It is found 
      that the augmentation of light extraction efficiency is mainly attributed to the 
      MLAs, while the gratings can improve the viewing angle by increasing the angular 
      distribution uniformity. A novel approach was proposed by combining photoresist 
      thermal reflow, soft-lithography and plasma treatments on polydimethylsiloxane 
      (PDMS) surfaces synergistically to realize gratings on the wavy surface of MLAs. 
      It has been proved that with the hybrid MLAs/gratings, the external quantum 
      efficiency (EQE) of the OLED can reach up to 22.8%, which increased by 24% 
      compared to that of bare OLED. Moreover, the OLED with the hybrid MLAs/gratings 
      showed an obvious lateral enhancement at wider viewing angle.
FAU - Chen, Guixiong
AU  - Chen G
FAU - Weng, Yalian
AU  - Weng Y
FAU - Lai, Xiaocong
AU  - Lai X
FAU - Wang, Wenwen
AU  - Wang W
FAU - Zhou, Xiongtu
AU  - Zhou X
FAU - Yan, Qun
AU  - Yan Q
FAU - Guo, Tailiang
AU  - Guo T
FAU - Zhang, Yongai
AU  - Zhang Y
FAU - Wu, Chaoxing
AU  - Wu C
LA  - eng
PT  - Journal Article
PL  - United States
TA  - Opt Express
JT  - Optics express
JID - 101137103
SB  - IM
EDAT- 2021/10/08 06:00
MHDA- 2021/10/08 06:01
CRDT- 2021/10/07 01:02
PHST- 2021/10/07 01:02 [entrez]
PHST- 2021/10/08 06:00 [pubmed]
PHST- 2021/10/08 06:01 [medline]
AID - 453805 [pii]
AID - 10.1364/OE.427258 [doi]
PST - ppublish
SO  - Opt Express. 2021 Aug 2;29(16):25812-25823. doi: 10.1364/OE.427258.