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PbS Quantum Dots Embedded in a ZnS Dielectric Matrix for Bulk Heterojunction Solar Cell Applications
Author(s) -
Sun Lidong,
Koh Zhen Yu,
Wang Qing
Publication year - 2013
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201301544
Subject(s) - quantum dot , materials science , heterojunction , mesoporous material , amorphous solid , nanotechnology , dielectric , zinc sulfide , solar cell , optoelectronics , crystallography , catalysis , biochemistry , chemistry , zinc , metallurgy
We demonstrate a novel bulk heterojunction structure based on a mesoporous TiO 2 substrate, PbS quantum dots (QDs), and a ZnS dielectric medium. The galena PbS QD arrays embedded in an amorphous ZnS matrix are adopted to fill up the mesoporous TiO 2 electrode with an in situ approach, i.e., successive ionic layer adsorption and reaction. The inorganic ZnS resembles the capping material normally used in colloidal QDs to control the size of PbS.