Advanced Photonics, Volume. 6, Issue 1, 014001(2024)
Organic near-infrared optoelectronic materials and devices: an overview
Fig. 1. (a) Mechanism of photogenerated charge transfer. (b) Mechanisms of fluorescence and phosphorescence. (c) Main contents of this review.
Fig. 3. (a) Device structure combining ST-OSC and 3-DM. (b) Transmission spectra of ST-OSC with different active layers. (c) Transmission spectra of different active layers added with 3-DMs. (d) Photographs of the ternary ST-OSC and glass coating. (e) Schematic diagram of the device structure of the tandem solar cell. (f)
Fig. 4. Representative small molecule and polymer materials for NIR OPDs.
Fig. 5. (a) Schematic of the device structure of ultraflexible NIR OPDs. (b) Transmittance of parylene on different substances. (c) Photograph of fingerprint-conformal NIR OPDs, and the inset indicates the position of the skin-conformal NIR OPDs on the finger. (d) Device structure of the NIR OPDs. (e) Absorption spectra of PTB7-Th (red), CO1-4Cl (blue), and their BHJ blend (purple) in thin films. (f) Working principle of NIR photoplethysmography. [(a)–(c) Reproduced with permission,100 © 2018 WILEY-VCH. (d)–(f) Reproduced with permission,107 © 2019 WILEY-VCH.]
Fig. 6. (a) Mechanism of emitting light of three generations of OLEDs. (b)–(d) Representative NIR materials for each of the three generations of OLEDs.
Fig. 7. (a) OLED EQE of the materials mentioned in the article. (b) Crystal structure and intermolecular interaction of TBSMCN. (c) EL spectra of devices with different structures of TBSMCN. (d) EQE of devices with different structures of TBSMCN at different current densities. [(b)–(d) Reproduced with permission,117 © 2022 WILEY-VCH.]
Fig. 8. (a) Molecular structures of LDS 798. (b) Schematic illustration of the formation of LDS 798@rho-ZMOF microcrystals via an ion exchange process. (c) Room-temperature PL spectra of an individual LDS 798@rho-ZMOF microcrystal under different pump densities at 532 nm. (d1)–(d3) The molecular structures of compounds 64, 65, and 66. (e) PL spectra of compound 64 in doped films at different pumping energies. (f) Laser emission spectra of compound 64 in doped films of different concentrations. (g1) Schematic diagram of the dye-doped film. (g2) The lasing emission spectra from the active waveguide with the FP cavity at increasing excitation levels near the threshold. (h) Molecular structure of ADH. (i) Calculated relative energies (
Fig. 9. (a) Molecular structures of 67, 68, 69. (b1), (b2) PL spectra of compounds 67 and 68. (c) Images of 1R, 1O, heated 1O, and the heated phase transition of 1O. (d) PL spectra of 1R. (e) Chemical structures of representative materials. (f) PL spectra of
Fig. 10. (a) Fluorescence microscopy images of Pb-Bpeb. Inset: molecular structure of Pb-Bpeb. (b) 1D crystal by exciting the individual crystals at different positions with a laser beam (
Fig. 11. Present challenges in organic NIR optoelectronic materials.
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Zong-Lu Che, Chang-Cun Yan, Xue-Dong Wang, Liang-Sheng Liao, "Organic near-infrared optoelectronic materials and devices: an overview," Adv. Photon. 6, 014001 (2024)
Category: Reviews
Received: Feb. 28, 2023
Accepted: Dec. 6, 2023
Posted: Dec. 6, 2023
Published Online: Jan. 9, 2024
The Author Email: Chang-Cun Yan (cyan@suda.edu.cn), Xue-Dong Wang (wangxuedong@suda.edu.cn), Liang-Sheng Liao (lsliao@suda.edu.cn)