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Highly oriented perovskites for efficient light-emitting diodes with balanced charge transport
Du, HY; Hui, W; Tang, LQ; Qiu, J; Niu, TT; Yang, YG; Gao, XY; Xia, YD; Chen, YH; Huang, W
2020
Source PublicationORGANIC ELECTRONICS
ISSN1566-1199
Volume77Pages:-
Subtype期刊论文
AbstractRuddlesden-Popper (RP) perovskites have attracted interests due to high performance in perovskite light-emitting diodes (PeLEDs). However, the insulating organic spacers decrease carrier mobility, and increase charge accumulation and non-radiative recombination losses, which significantly undermine device performance. Herein, by blending NH3I(CH2)(8)NH3I (ODA) and INH3(CH2)(2)O(CH2)(2)O(CH2)(2)NH3I (EDBE) large organic spacers into the precursor solution, we achieve preferential orientation of perovskite crystals perpendicular to the substrate with conductive channels across the two injecting electrodes. Consequently, effective charge injection and balanced charge transport are achieved, which is beneficial to increase radiation recombination. A low turn-on voltage of 1.4 V is achieved for mixture-1.5 perovskite (ODA: EDBE = 3:2, molar ratio) PeLEDs, and a maximum external quantum efficiency increases to 5.8% (EL peak approximate to 766 nm) at 2.0 V with a current density of 6.05 mA cm(-2) compared to that of the pure ODA (2.4%) and EDBE (1.1%) devices. The findings may spur new developments in charge injection and electron-hole balance for realizing efficient PeLEDs.
KeywordPASSIVATION DYNAMICS IODIDE
DOI10.1016/j.orgel.2019.105529
Indexed BySCI ; EI
Language英语
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/32906
Collection中科院上海应用物理研究所2011-2020年
Affiliation1.Nanjing Tech Univ, Jiangsu Natl Synergist Innovat Ctr Adv Mat SICAM, KLOFE, NanjingTech, 30 South Puzhu Rd, Nanjing 211816, Peoples R China
2.Nanjing Tech Univ, Inst Adv Mat, Jiangsu Natl Synergist Innovat Ctr Adv Mat SICAM, NanjingTech, 30 South Puzhu Rd, Nanjing 211816, Peoples R China
3.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China
4.Northwestern Polytech Univ, Shaanxi Inst Flexible Elect SIFE, 127 West Youyi Rd, Xian 710072, Peoples R China
5.Nanjing Univ Posts & Telecommun, IAM, KLOEID, 9 Wenyuan Rd, Nanjing 210023, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Du, HY,Hui, W,Tang, LQ,et al. Highly oriented perovskites for efficient light-emitting diodes with balanced charge transport[J]. ORGANIC ELECTRONICS,2020,77:-.
APA Du, HY.,Hui, W.,Tang, LQ.,Qiu, J.,Niu, TT.,...&Huang, W.(2020).Highly oriented perovskites for efficient light-emitting diodes with balanced charge transport.ORGANIC ELECTRONICS,77,-.
MLA Du, HY,et al."Highly oriented perovskites for efficient light-emitting diodes with balanced charge transport".ORGANIC ELECTRONICS 77(2020):-.
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