Efficient quantum dot light-emitting diodes with ultra-homogeneous and highly ordered quantum dot monolayer
Source abstract
Abstract
对于采用旋涂法制备量子点层的传统量子点发光二极管(QLEDs)而言, 由于量子点有序性低, 量子点薄膜不可避免地出现空隙,导致器件在偏压下产生漏电流. 本研究中, 我们利用Langmuir-Blodgett(LB)技术制备了超均匀、高度有序的量子点单层, 并且采用水平提拉法(HL)将量子点单层作为发光层转移到红色QLEDs上, 器件表现出了高性能, 其外量子效率(EQE)为19.0%, 寿命(T95 @100 cd m−2)为13,324 h.由于致密有序的量子点单层减少了漏电流, EQE和寿命分别提高了15%和183%. 此外, LB技术是一种无有机溶剂气氛的方法, 避免了层间互溶,同时也可以精确控制量子点薄膜的厚度, 因此所制备的叠层白光QLEDs可以在4 V的低电压下获得白光. 最后, 我们成功地在9 cm × 5 cm的矩形基板上制备了超均匀大面积量子点单层, 表明LB-HL方法具有良好的尺寸可扩展性.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Quantum Dots Synthesis And Properties · Semiconductor Quantum Structures and Devices · Chalcogenide Semiconductor Thin Films
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (30)
Show source-provided references
1. Colvin VL, Schlamp MC, Alivisatos AP. Light-emitting diodes made from cadmium selenide nanocrystals and a semiconducting polymer. Nature, 1994, 370: 354–35710.1038/370354a0 ↗
2. Shirasaki Y, Supran GJ, Bawendi MG, et al. Emergence of colloidal quantum-dot light-emitting technologies. Nat Photon, 2013, 7: 13–2310.1038/nphoton.2012.328 ↗
3. Murray CB, Norris DJ, Bawendi MG. Synthesis and characterization of nearly monodisperse CdE (E = sulfur, selenium, tellurium) semiconductor nanocrystallites. J Am Chem Soc, 1993, 115: 8706–871510.1021/ja00072a025 ↗
4. Kim TH, Chung DY, Ku JY, et al. Heterogeneous stacking of nanodot monolayers by dry pick-and-place transfer and its applications in quantum dot light-emitting diodes. Nat Commun, 2013, 4: 2637–264510.1038/ncomms3637 ↗
5. Zhao J, Zhang J, Jiang C, et al. Electroluminescence from isolated CdSe/ZnS quantum dots in multilayered light-emitting diodes. J Appl Phys, 2004, 96: 3206–321010.1063/1.1784611 ↗
6. Coe S, Woo WK, Bawendi M, et al. Electroluminescence from single monolayers of nanocrystals in molecular organic devices. Nature, 2002, 420: 800–80310.1038/nature01217 ↗
7. Sun Q, Wang YA, Li LS, et al. Bright, multicoloured light-emitting diodes based on quantum dots. Nat Photon, 2007, 1: 717–72210.1038/nphoton.2007.226 ↗
8. Liu Y, Han F, Li F, et al. Inkjet-printed unclonable quantum dot fluorescent anti-counterfeiting labels with artificial intelligence authentication. Nat Commun, 2019, 10: 2409–241710.1038/s41467-019-10406-7 ↗
9. Won YH, Cho O, Kim T, et al. Highly efficient and stable InP/ZnSe/ZnS quantum dot light-emitting diodes. Nature, 2019, 575: 634–63810.1038/s41586-019-1771-5 ↗
10. Tian F, Zhu Y, Xu Z, et al. Achieving highly efficient and stable quantum dot light-emitting diodes with interface modification. IEEE Electron Device Lett, 2020, 41: 1384–138710.1109/LED.2020.3011505 ↗
11. Zhu Y, Hu H, Liu Y, et al. All-solution-processed high-performance quantum dot light emitting devices employing an inorganic thiocyanate as hole injection layer. Org Electron, 2019, 70: 279–28510.1016/j.orgel.2019.04.037 ↗
12. Liu Y, Li F, Xu Z, et al. Efficient all-solution processed quantum dot light emitting diodes based on inkjet printing technique. ACS Appl Mater Interfaces, 2017, 9: 25506–2551210.1021/acsami.7b05381 ↗
13. Bae WG, Kim HN, Kim D, et al. Scalable multiscale patterned structures inspired by nature: The role of hierarchy. Adv Mater, 2014, 26: 675–70010.1002/adma.201303412 ↗
14. Sanchez C, Arribart H, Giraud Guille MM. Biomimetism and bioinspiration as tools for the design of innovative materials and systems. Nat Mater, 2005, 4: 277–28810.1038/nmat1339 ↗
15. Luo D, Qin X, Song Q, et al. Ordered superparticles with an enhanced photoelectric effect by sub-nanometer interparticle distance. Adv Funct Mater, 2017, 27: 1701982–170199010.1002/adfm.201701982 ↗
16. Ariga K, Yamauchi Y, Mori T, et al. What can be done with the Langmuir-Blodgett method? Recent developments and its critical role in materials science. Adv Mater, 2013, 25: 6477–651210.1002/adma.201302283 ↗
17. Bourvon H, Le Calvez S, Kanaan H, et al. Langmuir-Schaeffer monolayers of colloidal nanocrystals for cost-efficient quantum dot light-emitting diodes. Adv Mater, 2012, 24: 4414–441810.1002/adma.201200981 ↗
18. Wang J, Yan H, Liu Z, et al. Langmuir-Blodgett self-assembly of ultrathin graphene quantum dot films with modulated optical properties. Nanoscale, 2018, 10: 19612–1962010.1039/C8NR05159C ↗
19. Lambert K, Capek RK, Bodnarchuk MI, et al. Langmuir-Schaefer deposition of quantum dot multilayers. Langmuir, 2010, 26: 7732–773610.1021/la904474h ↗
20. Crawford NF, Leblanc RM. CdSe and CdSe(ZnS) quantum dots in 2D: A Langmuir monolayer approach. Coord Chem Rev, 2014, 263–264: 13–2410.1016/j.ccr.2013.07.023 ↗
21. Lee KH, Han CY, Jang EP, et al. Full-color capable light-emitting diodes based on solution-processed quantum dot layer stacking. Nanoscale, 2018, 10: 6300–630510.1039/C8NR00307F ↗
22. Liu K, Jiang L. Bio-inspired design of multiscale structures for function integration. Nano Today, 2011, 6: 155–17510.1016/j.nantod.2011.02.002 ↗
23. Sun M, Watson GS, Zheng Y, et al. Wetting properties on nanostructured surfaces of cicada wings. J Exp Biol, 2009, 212: 3148–315510.1242/jeb.033373 ↗
24. Lambert K, Justo Y, Kamal JS, et al. Phase transitions in quantum-dot Langmuir films. Angew Chem Int Ed, 2011, 50: 12058–1206110.1002/anie.201105991 ↗
25. Xu J, Ji X, Gattás-Asfura KM, et al. Langmuir and Langmuir-Blodgett films of quantum dots. Colloids Surfs A-Physicochem Eng Aspects, 2006, 284–285: 35–4210.1016/j.colsurfa.2005.11.046 ↗
26. Chaudhary S, Ozkan M, Chan WCW. Trilayer hybrid polymer-quantum dot light-emitting diodes. Appl Phys Lett, 2004, 84: 2925–292710.1063/1.1699476 ↗
27. Zhu Y, Xu R, Zhou Y, et al. Ultrahighly efficient white quantum dot light-emitting diodes operating at low voltage. Adv Opt Mater, 2020, 8: 2001479–200148610.1002/adom.202001479 ↗
28. Acharya KP, Titov A, Hyvonen J, et al. Full color-tunable vertically stacked quantum dot light emitting diodes for next-generation displays and lighting. Nanoscale, 2020, 12: 24403–2441010.1039/D0NR06721K ↗
29. Wang L, Pan J, Qian J, et al. A highly efficient white quantum dot light-emitting diode employing magnesium doped zinc oxide as the electron transport layer based on bilayered quantum dot layers. J Mater Chem C, 2018, 6: 8099–810410.1039/C8TC03014F ↗
30. Zhang H, Su Q, Sun Y, et al. Efficient and color stable white quantum-dot light-emitting diodes with external quantum efficiency over 23%. Adv Opt Mater, 2018, 6: 1800354–180036110.1002/adom.201800354 ↗