Sodium doping in copper-phthalocyanine/C60 heterojunction for organic photovoltaic applications

被引：2

作者：

Chen, Hui-Ju ^{[1
]}

Wu, Hsuan-Ta ^{[1
]}

Hung, Kuang-Teng ^{[1
]}

Fu, Sheng-Wen ^{[1
]}

Shih, Chuan-Feng ^{[1
,2
]}

机构：

[1] Natl Cheng Kung Univ, Dept Elect Engn, Tainan 70101, Taiwan

[2] Natl Cheng Kung Univ, Ctr Micro Nano Sci & Technol, Tainan 70101, Taiwan

来源：

THIN SOLID FILMS | 2013年 / 544卷

关键词：

CuPc; C-60; Organic solar cell; Doping; Sodium; ENERGY-LEVEL SHIFT; CUPC;

D O I：

10.1016/j.tsf.2013.03.110

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Sodium was incorporating at the copper-phthalocyanine (CuPc)/C-60 interface in CuPc/C-60-based small-molecular solar cells to enhance their power conversion efficiency. C-60 was deposited on slightly sodium-doped CuPc. Post-annealing improved the cell properties. Post-annealing doubled the conversion efficiency of the least sodium-doped devices (75 degrees C, 40 min). The electron/hole mobility ratio gradually approached unity as the annealing time increased, indicating that a reduction in the space charge accumulation was the main cause of the increase of the short-circuit current. The mechanism of enhancement of carrier transport by annealing was investigated by making capacitance-voltage measurements and performing corresponding depth-profile analyses. (C) 2013 Elsevier B. V. All rights reserved.

引用

页码：249 / 253

页数：5

共 13 条

[1] Electric-field and temperature dependence of the hole mobility in poly(p-phenylene vinylene) [J].

Blom, PWM ;

deJong, MJM ;

vanMunster, MG .

PHYSICAL REVIEW B, 1997, 55 (02) :R656-R659

[2] Alkali metal doping and energy level shift in organic semiconductors [J].

Ding, HJ ;

Gao, YL .

APPLIED SURFACE SCIENCE, 2006, 252 (11) :3943-3947

[3] Electronic structure modification of copper phthalocyanine (CuPc) induced by intensive Na doping [J].

Ding, Huanjun ;

Park, Kiwan ;

Green, Kate ;

Gao, Yongli .

CHEMICAL PHYSICS LETTERS, 2008, 454 (4-6) :229-232

[4] The electronic properties of potassium doped copper-phthalocyanine studied by electron energy-loss spectroscopy [J].

Flatz, K. ;

Grobosch, M. ;

Knupfer, M. .

JOURNAL OF CHEMICAL PHYSICS, 2007, 126 (21)

[5] Cs doping and energy level shift in CuPc [J].

Gao, YL ;

Yan, L .

CHEMICAL PHYSICS LETTERS, 2003, 380 (3-4) :451-455

[6] EXPERIMENTAL AND THEORETICAL DETERMINATION OF THE MAGNETIC-SUSCEPTIBILITY OF C60 AND C70 [J].

HADDON, RC ;

SCHNEEMEYER, LF ;

WASZCZAK, JV ;

GLARUM, SH ;

TYCKO, R ;

DABBAGH, G ;

KORTAN, AR ;

MULLER, AJ ;

MUJSCE, AM ;

ROSSEINSKY, MJ ;

ZAHURAK, SM ;

MAKHIJA, AV ;

THIEL, FA ;

RAGHAVACHARI, K ;

COCKAYNE, E ;

ELSER, V .

NATURE, 1991, 350 (6313) :46-47

[7] Controlled p-type doping of polycrystalline and amorphous organic layers:: Self-consistent description of conductivity and field-effect mobility by a microscopic percolation model -: art. no. 195208 [J].

Maennig, B ;

Pfeiffer, M ;

Nollau, A ;

Zhou, X ;

Leo, K ;

Simon, P .

PHYSICAL REVIEW B, 2001, 64 (19)

[8] The unoccupied electronic structure of potassium doped copper phthalocyanine studied by near edge absorption fine structure [J].

Molodtsova, O. V. ;

Knupfer, M. ;

Aristov, V. Yu. ;

Vyalikh, D. V. ;

Zhilin, V. M. ;

Ossipyan, Yu. A. .

JOURNAL OF APPLIED PHYSICS, 2008, 103 (05)

[9] Electronic properties of potassium-doped CuPc [J].

Molodtsova, OV ;

Zhilin, VM ;

Vyalikh, DV ;

Aristov, VY ;

Knupfer, M .

JOURNAL OF APPLIED PHYSICS, 2005, 98 (09)

[10] Electronic structure of the organic semiconductor copper phthalocyanine and K-CuPc studied using photoemission spectroscopy [J].

Schwieger, T ;

Peisert, H ;

Golden, MS ;

Knupfer, M ;

Fink, J .

PHYSICAL REVIEW B, 2002, 66 (15) :1-5

← 1 2 →