Role of vertical segregation in semitransparent organic photovoltaics
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26310%2F14%3APU113473" target="_blank" >RIV/00216305:26310/14:PU113473 - isvavai.cz</a>
Result on the web
<a href="http://pubs.acs.org/doi/pdf/10.1021/am5071859" target="_blank" >http://pubs.acs.org/doi/pdf/10.1021/am5071859</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/am5071859" target="_blank" >10.1021/am5071859</a>
Alternative languages
Result language
angličtina
Original language name
Role of vertical segregation in semitransparent organic photovoltaics
Original language description
In this work, the efficiency of semitransparent organic photovoltaic (OPV) devices for low intensity applications is investigated as a function of the processing conditions. It is observed that a thermal treatment of the organic layer induces fullerene migration toward the active layer/air interface. This physical process gives rise to different vertical segregation profiles of donor and acceptor molecules. Once the back contact is deposited, the amount of fullerene covering the surface will determine the contact selectivity and leakage current of the device. Control of this leakage current may not be essential for devices fabricated for high illumination condition applications. However, devices to be used under low illumination conditions may be highly influenced by the presence of this parasitic dark current which flows in the opposite direction to photogenerated current. At the proximity of the contacts, the vertical segregation profile is inferred from optical and electrical measurements. In particular, external quantum efficiency (EQE) measurements carried out from a relatively opaque back contact provide local information on the materials spatially close to the light source. Alternatively, capacitance-voltage measurements enable calculation of the percentage of fullerene molecules covering the cathode contact. Overall, a versatile method that can be used in regular and inverted configuration is presented that explains the different behavior observed for devices to be used under low illumination conditions.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10401 - Organic chemistry
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2014
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
ACS APPL MATER INTER
ISSN
1944-8244
e-ISSN
1944-8252
Volume of the periodical
2015
Issue of the periodical within the volume
7
Country of publishing house
US - UNITED STATES
Number of pages
5
Pages from-to
1234-1239
UT code for WoS article
000348332700024
EID of the result in the Scopus database
2-s2.0-84921487802