Improved charge separation and transport efficiency in poly(3-hexylthiophene)-TiO2 nanorod bulk heterojunction solar cells

被引：58

作者：

Chang, Chia-Hao ^{[1
]}

Huang, Tse-Kai ^{[1
]}

Lin, Yu-Ting ^{[1
]}

Lin, Yun-Yue ^{[1
]}

Chen, Chun-Wei ^{[1
]}

Chu, Tsung-Hung ^{[1
]}

Su, Wei-Fang ^{[1
]}

机构：

[1] Natl Taiwan Univ, Dept Mat Sci & Engn, Taipei 106, Taiwan

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2008年 / 18卷 / 19期

关键词：

D O I：

10.1039/b800071a

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this article, we have fabricated photovoltaic devices based on the poly(3-hexylthiophene)-TiO2 nanorod bulk heterojunction. The microscopic mechanisms of charge separation and charge transport in the poly(3-hexylthiophene)-TiO2 nanorod nanocomposites have been investigated by photoluminescence quenching, time-resolved photoluminescence spectroscopy, and time-of-flight mobility measurements. Charge separation and transport efficiency can be improved by adding an adequate amount of TiO2 nanorods in polymer. In addition, the device performance can be further enhanced by thermal annealing or removal of insulating surfactant in the hybrid, giving an optimized device performance of a short circuit current density of 2.62 mA cm(-2), an open circuit voltage of 0.69 V, a fill factor of 0.63 under simulated A. M. 1.5 illumination ( 100 mWcm(-2)). The corresponding power conversion efficiency under 1 sun is about 1.14%.

引用

页码：2201 / 2207

页数：7

共 22 条

[1]

Arango AC, 2000, ADV MATER, V12, P1689, DOI 10.1002/1521-4095(200011)12:22<1689::AID-ADMA1689>3.0.CO

[2]

2-9

[3] CHARGE TRANSPORT IN DISORDERED ORGANIC PHOTOCONDUCTORS - A MONTE-CARLO SIMULATION STUDY [J].

BASSLER, H .

PHYSICA STATUS SOLIDI B-BASIC RESEARCH, 1993, 175 (01) :15-56

[4] Efficient hybrid solar cells from zinc oxide nanoparticles and a conjugated polymer [J].

Beek, WJE ;

Wienk, MM ;

Janssen, RAJ .

ADVANCED MATERIALS, 2004, 16 (12) :1009-+

[5] High ambipolar and balanced carrier mobility in regioregular poly(3-hexylthiophene) [J].

Choulis, SA ;

Kim, Y ;

Nelson, J ;

Bradley, DDC ;

Giles, M ;

Shkunov, M ;

McCulloch, I .

APPLIED PHYSICS LETTERS, 2004, 85 (17) :3890-3892

[6] Photovoltaic cells made from conjugated polymers infiltrated into mesoporous titania [J].

Coakley, KM ;

McGehee, MD .

APPLIED PHYSICS LETTERS, 2003, 83 (16) :3380-3382

[7] Low-temperature synthesis of soluble and processable organic-capped anatase TiO2 nanorods [J].

Cozzoli, PD ;

Kornowski, A ;

Weller, H .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2003, 125 (47) :14539-14548

[8] Electronic excitations in luminescent conjugated polymers [J].

Friend, RH ;

Denton, GJ ;

Halls, JJM ;

Harrison, NT ;

Holmes, AB ;

Kohler, A ;

Lux, A ;

Moratti, SC ;

Pichler, K ;

Tessler, N ;

Towns, K ;

Wittmann, HF .

SOLID STATE COMMUNICATIONS, 1997, 102 (2-3) :249-258

[9] Charge separation and transport in conjugated-polymer/semiconductor-nanocrystal composites studied by photoluminescence quenching and photoconductivity [J].

Greenham, NC ;

Peng, XG ;

Alivisatos, AP .

PHYSICAL REVIEW B, 1996, 54 (24) :17628-17637

[10] Hybrid nanorod-polymer solar cells [J].

Huynh, WU ;

Dittmer, JJ ;

Alivisatos, AP .

SCIENCE, 2002, 295 (5564) :2425-2427

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