Improved performance of perovskite light-emitting diodes with a NaCl doped PEDOT:PSS hole transport layer

被引：42

作者：

Huang, Xiaokun ^{[1
,2
,3
]}

Baeuerle, Rainer ^{[1
,4
]}

Scherz, Felix ^{[1
,3
]}

Tisserant, Jean-Nicolas ^{[1
]}

Kowalsky, Wolfgang ^{[1
,2
,3
]}

Lovrincic, Robert ^{[1
,2
,5
]}

Hernandez-Sosa, Gerardo ^{[1
,6
,7
]}

机构：

[1] InnavationLab, D-69115 Heidelberg, Germany

[2] Braunschweig Tech Univ, Inst High Frequency Technol, D-38106 Braunschweig, Germany

[3] Heidelberg Univ, Kirchhoff Inst Phys, D-69120 Heidelberg, Germany

[4] Heidelberg Univ, Organ Chem Inst, D-69120 Heidelberg, Germany

[5] TrinamiX GmbH, D-67063 Ludwigshafen, Germany

[6] Karlsruhe Inst Technol, Inst Microstruct Technol, D-76344 Eggenstein Leopoldshafin, Germany

[7] Karlsruhe Inst Technol, Light Technol Inst, D-76131 Karlsruhe, Germany

来源：

JOURNAL OF MATERIALS CHEMISTRY C | 2021年 / 9卷 / 12期

关键词：

Light emitting diodes - Alkali halides - Conducting polymers - Hole mobility - Sodium chloride - Charge injection;

D O I：

10.1039/d0tc06058e

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We demonstrate a simple and effective way to enhance the performance of perovskite light-emitting diodes (PeLEDs) by utilizing an alkali halide doped PEDOT:PSS as the hole transport layer (HTL). The alkali halide (NaCl) doping helped the growth of the quasi-2D perovskite phases on top of the PEDOT:PSS, it also significantly reduced the exciton quenching in PEDOT:PSS based PeLEDs. More importantly, the doping reduced the work function of the PEDOT:PSS surface, which appropriately modulated the hole injection leading to improved charge balance. This helps to control the recombination zone inside the thin perovskite emitting layer (similar to 10 nm). The optimized blue-green PeLEDs with the NaCl doped PEDOT:PSS HTL showed a maximum luminance of 1487 cd m(-2), current efficiency of 2.16 cd A(-1) with a low turn-on voltage of 3.0 V, which are 217% and 567% higher than the PeLEDs with the pristine PEDOT:PSS layer (turn-on voltage: 3.3 V), respectively.

引用

页码：4344 / 4350

页数：7

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