26 0

Improved light absorbance and quantum-dot loading by macroporous TiO2 photoanode for PbS quantum-dot-sensitized solar cells

Title
Improved light absorbance and quantum-dot loading by macroporous TiO2 photoanode for PbS quantum-dot-sensitized solar cells
Author
방진호
Keywords
QDSSCs; Macroporous; Photoanode; SILAR; Lead sulfide
Issue Date
2017-08
Publisher
ELSEVIER SCIENCE SA
Citation
MATERIALS CHEMISTRY AND PHYSICS, v. 196, page. 170-176
Abstract
Macroporous titanium dioxide (TiO2) layer was formed through selective etching of silica (SiO2) microspheres incorporated in TiO2/SiO2 composite layer, resulting in a significant increase in the photovoltaic performance of PbS quantum-dot-sensitized solar cells (Q)DSSCs). Strategic incorporation of macroporous TiO2 layer on top of a mesoporous layer improved the light absorption characteristics, which is concurrently attributed to light scattering behaviour of macropores and increased loading of quantum dots (QDs) via successive ionic layer adsorption and reaction process. Thereby, a direct increase in the photocurrent density of PbS-QDSSC was ensued. Open-circuit voltage decay analysis combined with in-depth electrochemical impedance spectroscopy revealed a significant improvement in the electron life time and recombination resistance of QDSSC which was credited to the barrier effect of more uniformly loaded PbS QDs inside macroporous TiO2 photoanode. (C) 2017 Elsevier B.V. All rights reserved.
URI
https://www.sciencedirect.com/science/article/pii/S0254058417302699?via%3Dihubhttp://repository.hanyang.ac.kr/handle/20.500.11754/115320
ISSN
0254-0584; 1879-3312
DOI
10.1016/j.matchemphys.2017.03.057
Appears in Collections:
GRADUATE SCHOOL[S](대학원) > BIONANOTECHNOLOGY(바이오나노학과) > Articles
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE