Effects of cathode modification using spin-coated lithium acetate on the performances of polymer bulk-heterojunction solar cells

被引：12

作者：

Jiang, Liang ^{[1
]}

Li, Aiyuan ^{[1
]}

Deng, Xianyu ^{[1
]}

Zheng, Shizhao ^{[2
]}

Wong, King-Young ^{[2
]}

机构：

[1] Harbin Inst Technol, Shenzhen Grad Sch, Res Ctr Adv Funct Mat & Devices, Shenzhen Key Lab Adv Mat,Sch Mat Sci & Engn, Shenzhen 518055, Peoples R China

[2] Chinese Univ Hong Kong, Dept Phys, Shatin, Hong Kong, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2013年 / 102卷 / 01期

关键词：

LIGHT-EMITTING-DIODES; PHOTOELECTRON-SPECTROSCOPY; FULLERENE; LIF; POLY(3-HEXYLTHIOPHENE); ELECTRODES; ALQ(3); LAYERS;

D O I：

10.1063/1.4773570

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In this report, we show that the performances of polymer bulk-heterojunction solar cells were improved by inserting thin films of lithium acetate layers between the active layer and the cathode using a spin-coating process. Comparing with the device without the cathode modification, significant enhancements of Voc (open circuit voltage) from 0.42V to 0.55V and device efficiency from 1.4% to 4.1% were achieved. X-ray and ultraviolet photoelectron spectroscopic studies indicate that both the improved damage tolerance of the active layer under the thermally evaporated metal and an n-type doping at the metal/organic interface play the crucial roles in the enhanced performances. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4773570]

引用

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