Enhanced two-photon-excited fluorescence from electron donor-acceptor exciplex

被引：19

作者：

Chen, Zhen ^{[1
]}

Dai, Chenghu ^{[1
]}

Zhou, Qian ^{[1
]}

Du, Huitian ^{[1
]}

Fan, Jihui ^{[1
]}

Han, Shenghao ^{[1
]}

Zhang, Chuang ^{[2
]}

Pang, Zhiyong ^{[1
]}

机构：

[1] Shandong Univ, Sch Microelect, State Key Lab Crystal Mat, Jinan 250100, Peoples R China

[2] Chinese Acad Sci, Inst Chem, Beijing 100190, Peoples R China

来源：

DYES AND PIGMENTS | 2021年 / 188卷

基金：

中国国家自然科学基金;

关键词：

Exciplex; Thermally activated delayed fluorescence; Two-photon absorption; Upconversion; LIGHT-EMITTING-DIODES; CHARGE-TRANSFER INTERACTIONS; TRANSFER STATES; ABSORPTION; DESIGN; EFFICIENCY; EMITTERS; CHANNEL; OLEDS;

D O I：

10.1016/j.dyepig.2021.109249

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Exciplex-based thermally activated delayed fluorescence (TADF) materials show long luminescence lifetimes and high quantum efficiency by converting the non-radiative triplets into the radiative singlets. Here, strong upconverted fluorescence from the amorphous thin films of TADF donor-acceptor (D-A) exciplexes is observed under near-infrared excitation. The spectroscopic studies demonstrate that the enhanced upconversion in exciplex emission combines a series of excited state processes including the two-photon absorption (TPA) of donors and the TADF of D-A pairs. The comparison between donor-only and D-A systems indicates that the upconversion is greatly facilitated by the energy harvesting mechanisms existing in the exciplex-based TADF materials. The results reveal the formation mechanism of exciplex excited-states following the two-photon excitation in D-A blends, and consequently the potentials of exciplex materials in nonlinear optics applications. Moreover, a maximum D-A distance of similar to 6.9 nm for two-photon excited exciplex formation is obtained.

引用

页数：7

共 51 条

[1] Electric Field Induce Blue Shift and Intensity Enhancement in 2D Exciplex Organic Light Emitting Diodes; Controlling Electron-Hole Separation [J].

Al Attar, Hameed A. ;

Monkman, Andy P. .

ADVANCED MATERIALS, 2016, 28 (36) :8014-8020

[2] Design of organic molecules with large two-photon absorption cross sections [J].

Albota, M ;

Beljonne, D ;

Brédas, JL ;

Ehrlich, JE ;

Fu, JY ;

Heikal, AA ;

Hess, SE ;

Kogej, T ;

Levin, MD ;

Marder, SR ;

McCord-Maughon, D ;

Perry, JW ;

Röckel, H ;

Rumi, M ;

Subramaniam, C ;

Webb, WW ;

Wu, XL ;

Xu, C .

SCIENCE, 1998, 281 (5383) :1653-1656

[3] Thermally activated delayed fluorescence OLEDs with fully solution processed organic layers exhibiting nearly 10% external quantum efficiency [J].

Albrecht, Ken ;

Matsuoka, Kenichi ;

Yokoyama, Daisuke ;

Sakai, Yoshiya ;

Nakayama, Akira ;

Fujita, Katsuhiko ;

Yamamoto, Kimihisa .

CHEMICAL COMMUNICATIONS, 2017, 53 (16) :2439-2442

[4] Reference-Free Traction Force Microscopy Platform Fabricated via Two-Photon Laser Scanning Lithography Enables Facile Measurement of Cell-Generated Forces [J].

Banda, Omar A. ;

Sabanayagam, Chandran R. ;

Slater, John H. .

ACS APPLIED MATERIALS & INTERFACES, 2019, 11 (20) :18233-18241

[5] Magnetic Field Effect in Organic Light-Emitting Diodes Based on Electron Donor-Acceptor Exciplex Chromophores Doped with Fluorescent Emitters [J].

Baniya, Sangita ;

Pang, Zhiyong ;

Sun, Dali ;

Zhai, Yaxin ;

Kwon, Ohyun ;

Choi, Hyeonho ;

Choi, Byoungki ;

Lee, Sangyoon ;

Vardeny, Valy .

ADVANCED FUNCTIONAL MATERIALS, 2016, 26 (38) :6930-6937

[6] Excited-state processes in the carotenoid zeaxanthin after excess energy excitation [J].

Billsten, HH ;

Pan, JX ;

Sinha, S ;

Pascher, T ;

Sundström, V ;

Polívka, T .

JOURNAL OF PHYSICAL CHEMISTRY A, 2005, 109 (31) :6852-6859

[7] Spin-dependent charge transfer state design rules in organic photovoltaics [J].

Chang, Wendi ;

Congreve, Daniel N. ;

Hontz, Eric ;

Bahlke, Matthias E. ;

McMahon, David P. ;

Reineke, Sebastian ;

Wu, Tony C. ;

Bulovic, Vladimir ;

Van Voorhis, Troy ;

Baldo, Marc A. .

NATURE COMMUNICATIONS, 2015, 6

[8] Two-photon polymerization initiators for three-dimensional optical data storage and microfabrication [J].

Cumpston, BH ;

Ananthavel, SP ;

Barlow, S ;

Dyer, DL ;

Ehrlich, JE ;

Erskine, LL ;

Heikal, AA ;

Kuebler, SM ;

Lee, IYS ;

McCord-Maughon, D ;

Qin, JQ ;

Röckel, H ;

Rumi, M ;

Wu, XL ;

Marder, SR ;

Perry, JW .

NATURE, 1999, 398 (6722) :51-54

[9] Facile synthesis of homochiral compounds integrating circularly polarized luminescence and two-photon excited fluorescence [J].

Deng, Wen-Ting ;

Qu, Hang ;

Huang, Zhe-Yu ;

Shi, Lin ;

Tang, Zhi-Yong ;

Cao, Xiao-Yu ;

Tao, Jun .

CHEMICAL COMMUNICATIONS, 2019, 55 (15) :2210-2213

[10]

Deotare PB, 2015, NAT MATER, V14, P1130, DOI [10.1038/nmat4424, 10.1038/NMAT4424]

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