Polymer Bulk Heterojunction Solar Cells with PEDOT:PSS Bilayer Structure as Hole Extraction Layer

被引：30

作者：

Kim, Wanjung ^{[1
,2
]}

Kim, Namhun ^{[1
]}

Kim, Jung Kyu ^{[2
]}

Park, Insun ^{[3
]}

Choi, Yeong Suk ^{[3
]}

Wang, Dong Hwan ^{[2
]}

Chae, Heeyeop ^{[1
,2
]}

Park, Jong Hyeok ^{[1
,2
]}

机构：

[1] Sungkyunkwan Univ, Sch Chem Engn, Suwon 440746, South Korea

[2] Sungkyunkwan Univ, SKKU Adv Inst Nanotechnol SAINT, Suwon 440746, South Korea

[3] Samsung Elect, Samsung Adv Inst Technol, Yongin 446712, South Korea

来源：

CHEMSUSCHEM | 2013年 / 6卷 / 06期

关键词：

electrochemistry; hole extraction layer; photochemistry; polymer solar cells; power conversion efficiency; LIGHT-EMITTING-DIODES; PHOTOVOLTAIC DEVICES; OPTICAL SPACER; WORK FUNCTION; EFFICIENCY; FILM; ANODES;

D O I：

10.1002/cssc.201200950

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A high current density obtained in a limited, nanometer-thick region is important for high efficiency polymer solar cells (PSCs). The conversion of incident photons to charge carriers only occurs in confined active layers; therefore, charge-carrier extraction from the active layer within the device by using solar light has an important impact on the current density and the related to power conversion efficiency. In this study, we observed a surprising result, that is, extracting the charge carrier generated in the active layer of a PSC device, with a thickness-controlled PEDOT:PSS bilayer that acted as a hole extraction layer (HEL), yielded a dramatically improved power conversion efficiency in two different model systems (P3HT:PC60BM and PCDTBT:PC70BM). To understand this phenomenon, we conducted optical strength simulation, photocurrent-voltage measurements, incident photon to charge carrier efficiency measurements, ultraviolet photoelectron spectroscopy, and AFM studies. The results revealed that approximately 60nm was the optimum PEDOT:PSS bilayer HEL thickness in PSCs for producing the maximum power conversion efficiency.

引用

页码：1070 / 1075

页数：6

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