Carrier Balanced Distribution Regulation of Multi-emissive Centers in Tandem PeLEDs

doi:10.15541/jim20230022

Abstract

Abstract:

Perovskite light-emitting diodes (PeLEDs), owing to their unique photoelectric performance, show promising prospects in display applications. Red, green, and blue monochromatic PeLEDs have achieved remarkable breakthroughs, but the study of red/green/blue perovskite co-electroluminescence is still delayed. This study proposed a strategy that an intermediate connection layer (ICL) with hole/electron generation and transport capability is introduced between perovskites. On the one hand, introduction of the ICL can inhibit ion exchange and energy transfer. On the other hand, ICL has a charge-generation function that ensures different perovskite centers capture enough carriers. Furthermore, the thickness of the hole transport layer (NPB) is optimized. Furthermore, the thickness of the hole transport layer (NPB) is regulated, the blue/green tandem PeLED achieved relatively balanced luminescence and exhibits the largest EQE of 0.33%. The developed red/green/blue tandem PeLED exhibits the highest EQE of 0.5%, which is the first report in the field of PeLEDs, and exhibits the largest External Quantum Efficiency(EQE) of 0.33%. The developed red/green/blue tandem PeLED exhibits the highest EQE of 0.5%. In conclusion, this work provides a reference strategy for the co-electroluminescence of multicolor perovskites, which is expected to promote the development of perovskite in display applications.

Key words: perovskite light-emitting diodes, multicolor emission centers, intermediate connection layer, carrier distribution regulation

CLC Number:

O472

WANG Run, XIANG Hengyang, ZENG Haibo. Carrier Balanced Distribution Regulation of Multi-emissive Centers in Tandem PeLEDs[J]. Journal of Inorganic Materials, 2023, 38(9): 1062-1068.

Figures/Tables 7

Fig. 1 (a) Device structure diagram of tandem PeLED; (b) Diagram of carrier transport and luminescence principle in tandem PeLEDs; (c-e) UV-visible absorption and photoluminescence characterization of tri-color perovskites: (c) Quasi-2D blue perovskite films; (d) Green perovskite QDs; (e) Red perovskite QDs Colorful figures are available on website

Fig. 2 Schematic diagram of energy levels of blue/green tandem PeLED and carrier transport process Colorful figures are available on website

Fig. 3 (a, d, g) Electroluminescence spectra, (b, e, h) intensity mappings, and (c, f, i) comparison of blue/green tandem PeLEDs with different NPB thicknesses under different driving voltages (a-c) 30 nm; (d-f) 40 nm; (g-i) 50 nm; B: Blue; G: Green Colorful figures are available on website

Fig. 4 EL performance of blue/green tandem PeLEDs (a) J-V curves; (b) L-V curves; (c) CE-V curves; (d) EQE-V curves

Fig. 5 Electroluminescence spectra of red/green/blue tandem PeLEDs (a) Electroluminescence spectra under different voltages; (b) J-V-L curves; (c) EQE-V-CE curves Colorful figures are available on website

Fig. S1 EL performance of red, green, and blue monochrome PeLEDs (a) J-V curves; (b) L-V curves; (c) CE-V curves; (d) EQE-V curves

Fig. S2 EL spectra of red, green, and blue monochrome PeLEDs under an applied voltage of 4.0 V

References 33

[1]	GUALDRÓN-REYES A F, MASI, MORA-SERÓ I. Progress in halide-perovskite nanocrystals with near-unity photoluminescence quantum yield. Trends in Chemistry, 2021, 3(6): 499. DOI URL
[2]	KIM Y H, CHO H, LEE T W. Metal halide perovskite light emitters. Proceedings of the National Academy of Sciences, 2016, 113(42): 11694. DOI URL
[3]	TANG X, HU Z, YUAN W, et al. Perovskite CsPb₂Br₅ microplate laser with enhanced stability and tunable properties. Advanced Optical Materials, 2017, 5(3): 1600788. DOI URL
[4]	孙丽媛, 卢鹏, 邓漫君, 等. 钙钛矿材料在发光二极管中的研究进展. 材料科学与工程学报, 2021, 39(4): 698.
[5]	苑帅, 沈万姗, 廖良生. 基于金属卤化物钙钛矿材料的高效发光二极管. 物理, 2021, 50(6): 8.
[6]	曹雨, 王娜娜, 伊昌, 等. 钙钛矿发光二极管:下一代发光与显示技术. 光学学报, 2022, 42(17): 9.
[7]	LIN K, XING J, QUAN L N, et al. Perovskite light-emitting diodes with external quantum efficiency exceeding 20 percent. Nature, 2018, 562(7726): 245. DOI
[8]	CAO Y, WANG N, TIAN H, et al. Perovskite light-emitting diodes based on spontaneously formed submicrometre-scale structures. Nature, 2018, 562(7726): 249. DOI
[9]	CHIBA T, HAYASHI Y, EBE H, et al. Anion-exchange red perovskite quantum dots with ammonium iodine salts for highly efficient light-emitting devices. Nature Photonics, 2018, 12(11): 681. DOI
[10]	HASSAN Y, PARK J H, CRAWFORD M L, et al. Ligand- engineered bandgap stability in mixed-halide perovskite LEDs. Nature, 2021, 591(7848): 72. DOI
[11]	XIE M, GUO J, Zhang X, et al. High-efficiency pure-red perovskite quantum-dot light-emitting diodes. Nano Letters, 2022, 22(20): 8266. DOI PMID
[12]	ZHANG J, ZHANG T, MA Z, et al. A multifunctional “halide- equivalent” anion enabling efficient CsPb(Br/I)₃ nanocrystals pure-red light-emitting diodes with external quantum efficiency exceeding 23%. Advanced Materials, 2022, 35(8): 2209002. DOI URL
[13]	XU W, HU Q, BAI S, et al. Rational molecular passivation for high-performance perovskite light-emitting diodes. Nature Photonics, 2019, 13(6): 418. DOI
[14]	FANG T, WANG T, LI X, et al. Perovskite QLED with an external quantum efficiency of over 21% by modulating electronic transport. Science Bulletin, 2021, 66(1): 36. DOI PMID
[15]	LIU Z, QIU W, PENG X, et al. Perovskite light-emitting diodes with EQE exceeding 28% through a synergetic dual-additive strategy for defect passivation and nanostructure regulation. Advanced Materials, 2021, 33(43): 2103268. DOI URL
[16]	CHU Z, YE Q, ZHAO Y, et al. Perovskite light-emitting diodes with external quantum efficiency exceeding 22% via small-molecule passivation. Advanced Materials, 2021, 33(18): 2007169. DOI URL
[17]	JIANG Y, SUN C, XU J, et al. Synthesis-on-substrate of quantum dot solids. Nature, 2022, 612(7941): 679. DOI
[18]	XIANG H, ZUO C, ZENG H, et al. White light-emitting diodes from perovskites. Journal of Semiconductors, 2021, 42(3): 030202. DOI
[19]	XIANG H, WANG R, CHEN J, et al. Research progress of full electroluminescent white light-emitting diodes based on a single emissive layer. Light: Science & Applications, 2021, 10(1): 206.
[20]	XIANG H, CHEN J, WANG R, et al. Perspective on single- emissive-layer white-LED based on perovskites. Applied Physics Letters, 2021, 119(8): 080502. DOI URL
[21]	ZHOU Y, FANG T, LIU G, et al. Perovskite anion exchange: a microdynamics model and a polar adsorption strategy for precise control of luminescence color. Advanced Functional Materials, 2021, 31(51): 2106871. DOI URL
[22]	WANG R, XIANG H, CHEN J, et al. Energy regulation in white-light-emitting diodes. ACS Energy Letters, 2022, 7(6): 2173. DOI URL
[23]	GHOSH S, MISHRA S, SINGH T. Antisolvents in perovskite solar cells: importance, issues, and alternatives. Advanced Materials Interfaces, 2020, 7(18): 2000950. DOI URL
[24]	CHANG C, SOLODUKHIN A, LIAO S, et al. Perovskite white light-emitting diodes based on a molecular blend perovskite emissive layer. Journal of Materials Chemistry C, 2019, 7(28): 8634. DOI
[25]	LIU D, LIU X, GAN Y, et al. Perovskite/organic hybrid white electroluminescent devices with the stable spectrum and extended operating lifetime. ACS Energy Letters, 2022, 7(1): 523. DOI URL
[26]	YAO E P, YANG Z, MENG L, et al. High-brightness blue and white LEDs based on inorganic perovskite nanocrystals and their composites. Advanced Materials, 2017, 29(23): 1606859. DOI URL
[27]	WANG C, XUE D, SHEN X, et al. White light-emitting devices based on ZnCdS/ZnS and perovskite nanocrystal heterojunction. Nanotechnology, 2019, 30(46): 465201. DOI URL
[28]	JIAN M, HONG L, YE F, et al. All-perovskite emission architecture for white light-emitting diodes. ACS Nano, 2018, 12(10): 10486. DOI PMID
[29]	YAN Y, ZHANG Q, Wang Z, et al. High-efficiency tandem white perovskite light-emitting diodes by using an organic/inorganic intermediate connector. Crystals, 2022, 12(9): 1286. DOI URL
[30]	ZHANG F, CAI B, SONG J, et al. Efficient blue perovskite light- emitting diodes boosted by 2D/3D energy cascade channels. Advanced Functional Materials, 2020, 30(27): 2001732. DOI URL
[31]	SONG J, FANG T, LI J, et al. Organic-inorganic hybrid passivation enables perovskite QLEDs with an EQE of 16.48%. Advanced Materials, 2018, 30(50): 1805409. DOI URL
[32]	LI Y, LI J, XU L, et al. CsPbI₃ perovskite quantum dots: fine purification and highly efficient light-emitting diodes. Acta Chimica Sinica, 2021, 79(1): 126. DOI URL
[33]	FUNG M, LI Y, LIAO L. Tandem organic light-emitting diodes. Advanced Materials, 2016, 28(47): 10381. DOI URL