@article {Su:2011:1533-4880:10027,
title = "Enhanced Performance of P3HT/TiO2 Bilayer Heterojunction Photovoltaic Device Having Gold Nanoparticles in the Donor Layer",
journal = "Journal of Nanoscience and Nanotechnology",
parent_itemid = "infobike://asp/jnn",
publishercode ="asp",
year = "2011",
volume = "11",
number = "11",
publication date ="2011-11-01T00:00:00",
pages = "10027-10035",
itemtype = "ARTICLE",
issn = "1533-4880",
eissn = "1533-4899",
url = "https://www.ingentaconnect.com/content/asp/jnn/2011/00000011/00000011/art00128",
doi = "doi:10.1166/jnn.2011.4982",
keyword = "GOLD NANOPARTICLE, P3HT, CONJUGATED POLYMER, COMPOSITE, PHOTOVOTAIC",
author = "Su, Yu-Wei and Yeh, Je-Yuan and Tsai, Hsin-Chih and Tsiang, Raymond Chien-Chao",
abstract = "The photovoltaic effects of blending gold nanoparticles (AuNPs) into the donor layer of a poly(3-hexylthiophene) (P3HT)/TiO2 bilayer heterojunction device have been studied. P3HT was synthesized via the modified Gragnard metathesis method and AuNPs with sizes ranging from
12 to 15 nm were formed via a reduction of HAuCl4. The blending of AuNPs into P3HT caused a lower photoluminescence (PL) intensities and a decreased energy level of the highest occupied molecular orbital (HOMO) than the pristine P3HT owing to the good electron-accepting nature of
AuNPs. Upon the use of P3HT-AuNPs as the donor layer, the decreased HOMO(donor) resulted in an increased open circuit voltage (V
oc) and thus enabled the fabricated (P3HT-AuNPs)/TiO2 bilayer heterojunction photovoltaic device to have an improved power
conversion efficiency of solar energy. V
oc as well as the overall power conversion efficiency increased with an increase in the AuNP content as a result of additional interfaces which facilitated the charge separation of excitons and percolation pathways which enhanced the
electron transfer to the TiO2 acceptor. Furthermore, unannealed P3HT-AuNPs exhibited nanoholes and provided photovoltaic devices a power conversion efficiency nearly two time higher than annealed P3HT-AuNPs.",
}