Enhanced Photovoltaic Performance of Inverted Polymer Solar Cells utilizing Versatile Chemically Functionalized ZnO@graphene Quantum dot Monolayer

Title
Enhanced Photovoltaic Performance of Inverted Polymer Solar Cells utilizing Versatile Chemically Functionalized ZnO@graphene Quantum dot Monolayer
Authors
문병준이규승심재호박수형김세호배수강박민이창렬최원국이연진황준연손동익
Keywords
polymer solar cells; charge transfer; quenching; ZnO@graphene quantum dots; chemically functionalization; monolayer; surfacemodifiers
Issue Date
2016-01
Publisher
Nano energy
Citation
VOL 20, 221-232
Abstract
Recently, interfacial engineering approaches as an efficient strategy for improving the power conversion efficiencies (PCEs) of inverted polymer solar cells (iPSCs) has attracted considerable attention. Among various efficient solutions, solution-processed metal-oxide films prepared from metal oxide sol–gel precursors (or nanoparticles) and polymer surface modifiers are typically used as electron selective interfaces in the inverted cell geometry. To present a more effective strategy for surpassing the limitations of traditional methods, such as an unintended increase in series or contact resistance by incompatibility at the organic/inorganic interface, inherently insulating nature of non-conjugated surface modifiers and oxygen adsorption (or photo-induced doping) of metal-oxide layer, we synthesize chemically surface-modified ZnO@graphene core–shell type quantum dots (ZGQDs) with well-characterization of the chemical, optical and electrical properties, and fabricate iPSCs consisting of ITO/PEIE/ZGQD-OAs/photoactive layer/MoO3/Ag. The mono-layered QDs play the multi-functional role as surface modifier, sub-photosensitizer and electron transport layer. Using this effective approach, we achieve the highest conversion efficiency of ~10.3% resulting from improved interfacial properties and efficient charge transfer based on static quenching and charge transfer reaction from ZnO to graphene nanosheets (with drastically reduced τavg (~ 60 ps)), which is verified by various analysis tools.
URI
http://pubs.kist.re.kr/handle/201004/58430
ISSN
22112855
Appears in Collections:
KIST Publication > Article
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