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Low-Threshold Organic Semiconductor Lasers with the Aid of Phosphorescent Ir(III) Complexes as Triplet Sensitizers
Yi Jiang1; Peng Lv1; Jin‐Qiang Pan1; Yan Li2; He Lin1; Xin‐Wen Zhang1; Jiong Wang1; Yuan‐Yuan Liu1; Qi Wei2; Gui‐Chuan Xing2; Wen‐Yong Lai1,3; Wei Huang1,3
2019
Source PublicationAdvanced Functional Materials
ISSN1616-301X
Abstract

Organic semiconductor lasers (OSLs) have emerged as particularly challenging. One of the major issues preventing the successful realization of lasing from organic emitters under electrically pumped conditions is the inevitable population of triplet excitons. Herein, a novel concept is presented to construct triplet–singlet guest–host gain systems with incorporating iridium complexes as the triplet sensitizers and a fluorescent conjugated polymer as the gain media to achieve light amplification. The direct triplet–singlet energy transfer process is confirmed by photoluminescence excitation spectra, photoinduced absorption spectroscopy, and fluorescence transients of the blend samples. Successful light amplification with a threefold lower amplified spontaneous emission threshold and much better lasing performance is demonstrated for the resulting triplet–singlet guest–host system as compared with the corresponding gain system without triplet sensitizers. Moreover, under electrically driven conditions, the fluorescent organic light-emitting diodes (OLEDs) based on the triplet–singlet guest–host systems with “triplet sensitizers” exhibit enhanced electrical performance relative to those without. The work suggests an effective general methodology to utilize both the singlet and triplet excitons to contribute to the light amplification with excellent electrical performance in OLEDs, opening prospects toward attempting electrically pumped OSLs.

KeywordFörster Resonance Energy Transfer (Fret) Organic Gain Media Organic Semiconductor Lasers (Osls) Phosphorescent Ir(Iii) Complexes Triplet Sensitizers
DOIhttp://doi.org/10.1002/adfm.201806719
URLView the original
Language英语
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Document TypeJournal article
CollectionInstitute of Applied Physics and Materials Engineering
Corresponding AuthorWen‐Yong Lai
Affiliation1.Key Laboratory for Organic Electronics and Information Displays, Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing,
2.Institute of Applied Physics and Materials Engineering, University of Macau, Macao, SAR, 999078, China
3.Shaanxi Institute of Flexible Electronics (SIFE), Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi'an, 710072, Shaanxi, China
Recommended Citation
GB/T 7714
Yi Jiang,Peng Lv,Jin‐Qiang Pan,et al. Low-Threshold Organic Semiconductor Lasers with the Aid of Phosphorescent Ir(III) Complexes as Triplet Sensitizers[J]. Advanced Functional Materials,2019.
APA Yi Jiang.,Peng Lv.,Jin‐Qiang Pan.,Yan Li.,He Lin.,...&Wei Huang.(2019).Low-Threshold Organic Semiconductor Lasers with the Aid of Phosphorescent Ir(III) Complexes as Triplet Sensitizers.Advanced Functional Materials.
MLA Yi Jiang,et al."Low-Threshold Organic Semiconductor Lasers with the Aid of Phosphorescent Ir(III) Complexes as Triplet Sensitizers".Advanced Functional Materials (2019).
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