Interplay of three-dimensional morphologies and photocarrier dynamics of polymer/TiO 2 bulk heterojunction solar cells

Shao Sian Li, Ching Pin Chang, Chih Cheng Lin, Yun Yue Lin, Chia Hao Chang, Jer Ren Yang, Ming Wen Chu, Chun Wei Chen

Research output: Contribution to journalArticle

60 Citations (Scopus)

Abstract

In this study, we investigated the interplay of three-dimensional morphologies and the photocarrier dynamics of polymer/inorganic nanocrystal hybrid photoactive layers consisting of TiO 2 nanoparticles and nanorods. Electron tomography based on scanning transmission electron microscopy using high-angle annular dark-field imaging was performed to analyze the morphological organization of TiO 2 nanocrystals in poly(3-hexylthiophene) (P3HT) in optimal solar cell devices. The Three-dimensional (3D) morphologies of these hybrid films were correlated with the photocarrier dynamics of charge separation, transport, and recombination, which were comprehensively probed by various transient techniques. Visualization of these 3D bulk heterojunction morphologies clearly reveals that elongated and anisotropic TiO 2 nanorods in P3HT not only can significantly reduce the probability of the interparticle hopping transport of electrons by providing better connectivity with respect to the TiO 2 nanoparticles, but also tend to form a large-scale donor-acceptor phase-separated morphology, which was found to enhance hole transport. The results support the establishment of a favorable morphology for polymer/inorganic hybrid solar cells due to the presence of the dimensionality of TiO 2 nanocrystals as a result of more effective mobile carrier generation and more efficient and balanced transport of carriers.

Original languageEnglish
Pages (from-to)11614-11620
Number of pages7
JournalJournal of the American Chemical Society
Volume133
Issue number30
DOIs
Publication statusPublished - Aug 3 2011
Externally publishedYes

Fingerprint

Nanoparticles
Heterojunctions
Solar cells
Polymers
Nanocrystals
Inorganic polymers
Nanotubes
Nanorods
Electron Microscope Tomography
Scanning Transmission Electron Microscopy
Electrons
Hybrid Cells
Electron Transport
Genetic Recombination
Tomography
Visualization
Transmission electron microscopy
Imaging techniques
Equipment and Supplies
Scanning electron microscopy

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

Cite this

Interplay of three-dimensional morphologies and photocarrier dynamics of polymer/TiO 2 bulk heterojunction solar cells. / Li, Shao Sian; Chang, Ching Pin; Lin, Chih Cheng; Lin, Yun Yue; Chang, Chia Hao; Yang, Jer Ren; Chu, Ming Wen; Chen, Chun Wei.

In: Journal of the American Chemical Society, Vol. 133, No. 30, 03.08.2011, p. 11614-11620.

Research output: Contribution to journalArticle

Li, Shao Sian ; Chang, Ching Pin ; Lin, Chih Cheng ; Lin, Yun Yue ; Chang, Chia Hao ; Yang, Jer Ren ; Chu, Ming Wen ; Chen, Chun Wei. / Interplay of three-dimensional morphologies and photocarrier dynamics of polymer/TiO 2 bulk heterojunction solar cells. In: Journal of the American Chemical Society. 2011 ; Vol. 133, No. 30. pp. 11614-11620.
@article{054f1a18d20d40ed9b7d1fc84e3411cf,
title = "Interplay of three-dimensional morphologies and photocarrier dynamics of polymer/TiO 2 bulk heterojunction solar cells",
abstract = "In this study, we investigated the interplay of three-dimensional morphologies and the photocarrier dynamics of polymer/inorganic nanocrystal hybrid photoactive layers consisting of TiO 2 nanoparticles and nanorods. Electron tomography based on scanning transmission electron microscopy using high-angle annular dark-field imaging was performed to analyze the morphological organization of TiO 2 nanocrystals in poly(3-hexylthiophene) (P3HT) in optimal solar cell devices. The Three-dimensional (3D) morphologies of these hybrid films were correlated with the photocarrier dynamics of charge separation, transport, and recombination, which were comprehensively probed by various transient techniques. Visualization of these 3D bulk heterojunction morphologies clearly reveals that elongated and anisotropic TiO 2 nanorods in P3HT not only can significantly reduce the probability of the interparticle hopping transport of electrons by providing better connectivity with respect to the TiO 2 nanoparticles, but also tend to form a large-scale donor-acceptor phase-separated morphology, which was found to enhance hole transport. The results support the establishment of a favorable morphology for polymer/inorganic hybrid solar cells due to the presence of the dimensionality of TiO 2 nanocrystals as a result of more effective mobile carrier generation and more efficient and balanced transport of carriers.",
author = "Li, {Shao Sian} and Chang, {Ching Pin} and Lin, {Chih Cheng} and Lin, {Yun Yue} and Chang, {Chia Hao} and Yang, {Jer Ren} and Chu, {Ming Wen} and Chen, {Chun Wei}",
year = "2011",
month = "8",
day = "3",
doi = "10.1021/ja203151z",
language = "English",
volume = "133",
pages = "11614--11620",
journal = "Journal of the American Chemical Society",
issn = "0002-7863",
publisher = "American Chemical Society",
number = "30",

}

TY - JOUR

T1 - Interplay of three-dimensional morphologies and photocarrier dynamics of polymer/TiO 2 bulk heterojunction solar cells

AU - Li, Shao Sian

AU - Chang, Ching Pin

AU - Lin, Chih Cheng

AU - Lin, Yun Yue

AU - Chang, Chia Hao

AU - Yang, Jer Ren

AU - Chu, Ming Wen

AU - Chen, Chun Wei

PY - 2011/8/3

Y1 - 2011/8/3

N2 - In this study, we investigated the interplay of three-dimensional morphologies and the photocarrier dynamics of polymer/inorganic nanocrystal hybrid photoactive layers consisting of TiO 2 nanoparticles and nanorods. Electron tomography based on scanning transmission electron microscopy using high-angle annular dark-field imaging was performed to analyze the morphological organization of TiO 2 nanocrystals in poly(3-hexylthiophene) (P3HT) in optimal solar cell devices. The Three-dimensional (3D) morphologies of these hybrid films were correlated with the photocarrier dynamics of charge separation, transport, and recombination, which were comprehensively probed by various transient techniques. Visualization of these 3D bulk heterojunction morphologies clearly reveals that elongated and anisotropic TiO 2 nanorods in P3HT not only can significantly reduce the probability of the interparticle hopping transport of electrons by providing better connectivity with respect to the TiO 2 nanoparticles, but also tend to form a large-scale donor-acceptor phase-separated morphology, which was found to enhance hole transport. The results support the establishment of a favorable morphology for polymer/inorganic hybrid solar cells due to the presence of the dimensionality of TiO 2 nanocrystals as a result of more effective mobile carrier generation and more efficient and balanced transport of carriers.

AB - In this study, we investigated the interplay of three-dimensional morphologies and the photocarrier dynamics of polymer/inorganic nanocrystal hybrid photoactive layers consisting of TiO 2 nanoparticles and nanorods. Electron tomography based on scanning transmission electron microscopy using high-angle annular dark-field imaging was performed to analyze the morphological organization of TiO 2 nanocrystals in poly(3-hexylthiophene) (P3HT) in optimal solar cell devices. The Three-dimensional (3D) morphologies of these hybrid films were correlated with the photocarrier dynamics of charge separation, transport, and recombination, which were comprehensively probed by various transient techniques. Visualization of these 3D bulk heterojunction morphologies clearly reveals that elongated and anisotropic TiO 2 nanorods in P3HT not only can significantly reduce the probability of the interparticle hopping transport of electrons by providing better connectivity with respect to the TiO 2 nanoparticles, but also tend to form a large-scale donor-acceptor phase-separated morphology, which was found to enhance hole transport. The results support the establishment of a favorable morphology for polymer/inorganic hybrid solar cells due to the presence of the dimensionality of TiO 2 nanocrystals as a result of more effective mobile carrier generation and more efficient and balanced transport of carriers.

UR - http://www.scopus.com/inward/record.url?scp=79960883839&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79960883839&partnerID=8YFLogxK

U2 - 10.1021/ja203151z

DO - 10.1021/ja203151z

M3 - Article

C2 - 21682313

AN - SCOPUS:79960883839

VL - 133

SP - 11614

EP - 11620

JO - Journal of the American Chemical Society

JF - Journal of the American Chemical Society

SN - 0002-7863

IS - 30

ER -