Improved performance of flexible perovskite light-emitting diodes with modified PEDOT:PSS hole transport layer

Haesook Kim; Ha Na Ra; Ji Sun Kim; Sang-Hyon Paek; Jongwook Park; Young Chul Kim

Journal of Industrial and Engineering Chemistry, Vol.90, 117-121, October, 2020

DOI10.1016/j.jiec.2020.07.003 Export Citation

Improved performance of flexible perovskite light-emitting diodes with modified PEDOT:PSS hole transport layer

Haesook Kim¹, Ha Na Ra¹, Ji Sun Kim¹, Sang-Hyon Paek², Jongwook Park², and Young Chul Kim^{1, 2, †}

¹Regional Innovation Center for Components and Materials for Information Display, Kyung Hee University, Yongin-si, Gyeonggi-do 17104, Republic of Korea
²Department of Chemical Engineering, Kyung Hee University, Yongin-si, Gyeonggi-do 17104, Republic of Korea

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We demonstrated the improved device performance of flexible perovskite light-emitting diodes (PeLEDs) on indium-tin oxide coated poly(ethylene terephthalate) (ITO/PET) substrates by using modified poly (3,4-ethylene dioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) as a hole transport layer (HTL). Solvent modification and dopant modification of the PEDOT:PSS solution were carried out by adding isopropyl alcohol (IPA) and poly(sodium 4-styrenesulfonate) (PSS-Na), respectively, to the pristine solution. Devices with the modified HTLs, PEDOT:PSS + IPA and PEDOT:PSS + PSS-Na, exhibited a significant enhancement in both luminance and efficiency. The work function of HTL was improved to reduce the energy barrier against the perovskite layer and facilitate hole transport. The perovskite films deposited on the modified PEDOT:PSS layers showed a uniformly covered surface morphology without any defects, resulting in an increased PL intensity. In particular, the perovskite film coated on the dopant modified HTL showed a better crystallinity and reduced luminescence quenching. The PeLED device with the PEDOT:PSS + PSS-Na HTL exhibited a maximum luminance of 3900 cd/m2, a maximum current efficiency of 25.1 cd/A, and a maximum external quantum efficiency of 5.9%.

Keywords:Perovskite light-emitting diodes;Modified PEDOT:PSS;Flexible substrates

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Meng Y, Ahmadi M, Wu X, Xu T, Xu L, Xiong Z, Chen P, Org. Electron., 64, 47 (2019)
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[Referenced By]

[1] Veldhuis SA, Boix PP, Yantara N, Li MJ, Sum TC, Mathews N, Mhaisalkar SG, Adv. Mater., 28(32), 6804 (2016)

[2] Cao Y, Wang NN, Tian H, Guo JS, Wei YQ, Chen H, Miao YF, Zou W, Pan K, He YR, Cao H, Ke Y, Xu MM, Wang Y, Yang M, Du K, Fu ZW, Kong DC, Dai DX, Jin YZ, Li GQ, Li H, Peng QM, Wang JP, Huang W, Nature, 562(7726), 249 (2018)

[3] Lin KB, Xing J, Quan LN, de Arquer FPG, Gong XW, Lu JX, Xie LQ, Zhao WJ, Zhang D, Yan CZ, Li WQ, Liu XY, Lu Y, Kirman J, Sargent EH, Xiong QH, Wei ZH, Nature, 562(7726), 245 (2018)

[4] Rui H, Li L, Zhang N, Lim X, Hua Y, Wu X, Wang D, Yin S, IEEE Electron Device Lett., 40, 59 (2019)

[5] Lee S, Kim DB, Hamilton I, Daboczi M, Nam YS, Lee BR, Zhao B, Jang CH, Friend RH, Kim JS, Song MH, Adv. Sci., 5, 180135 (2018)

[6] Wang Z, Li Z, Zhou D, Yu J, Appl. Phys. Lett., 111, 233304 (2017)

[7] Yao X, Xu W, Huang X, Qi J, Yin Q, Jiang X, Huang F, Gong X, Cao Y, Org. Electron., 47, 85 (2017)

[8] Guo Q, Wang C, Li J, Bai Y, Wang F, Liu L, Zhang B, Hayat T, Alsaedi A, Tan Z, Phys. Chem. Chem. Phys., 20, 21746 (2018)

[9] Zheng CX, Li FS, Zeng QY, Hu HL, Guo TL, Thin Solid Films, 669, 387 (2019)

[10] Choy WCH, Zhang D, Small, 12, 416 (2016)

[11] Wang Z, Luo Z, Zhao C, Guo Q, Wang Y, Wang F, Bian X, Alsaedi A, Hayat T, Tan Z, J. Phys. Chem. C, 121, 28132 (2017)

[12] Shi Z, Li S, Li Y, Ji H, Li X, Wu D, Xu T, Chen Y, Tian Y, Zhang Y, Shan C, Du G, ACS Nano, 12, 1462 (2018)

[13] Liu YF, Zhang YF, Xu M, Zhang ZY, Tao J, Gu Y, Feng J, Sun HB, IEEE Photonics J., 9, 160040 (2017)

[14] Chen P, Xiong Z, Wu X, Shao M, Ma X, Xiong ZH, Gao C, J. Phys. Chem. Letter., 8, 1810 (2017)

[15] Kim DB, Yu JC, Nam YS, Kim DW, Jung ED, Lee SY, Lee S, PArk JH, et al., J. Mater. Chem. C, 4, 8161 (2016)

[16] Meng Y, Ahmadi M, Wu X, Xu T, Xu L, Xiong Z, Chen P, Org. Electron., 64, 47 (2019)

[17] Yang X, Zhang X, Deng J, Chu Z, Jiang Q, Meng J, Wang P, Zhang L, Yin You J, Nat. Cummun., 9, 570 (2018)

[18] Park H, Shi Y, Kong J, Nanoscale, 5, 8934 (2013)

[19] Peng XF, Wu XY, Ji XX, Ren J, Wang Q, Li GQ, Yang XH, J. Phys. Chem. Lett., 9, 4691 (2017)

[20] Wang J, Song C, He Z, Mai C, Xie G, Mu L, Cun Y, Li J, Wang J, Peng J, Cao Y, Adv. Mater., 30, 180413 (2018)