Correlating Structure And Function In Small Molecule Organic Solar Cells By Means Of Scanning Probe And Electron Microscopy

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Correlating Structure And Function In Small Molecule Organic Solar Cells By Means Of Scanning Probe And Electron Microscopy

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Author : Michael Scherer
language : en
Publisher: BoD – Books on Demand
Release Date : 2016-07-20

Correlating Structure And Function In Small Molecule Organic Solar Cells By Means Of Scanning Probe And Electron Microscopy written by Michael Scherer and has been published by BoD – Books on Demand this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-07-20 with Science categories.

In this work nanoscale properties in active layers of small molecule organic solar cells are studied regarding their impact on device performance. For this, the effect of variations in stack design and process conditions is examined both electrically and with high resolution imaging techniques. Two topics are addressed: (i) the visualization of charge extraction/injection properties of solar cell contacts and (ii) the tailoring of structural properties of co-evaporated material blends for bulk heterojunction (BHJ) organic solar cells. (i) We study the impact of controlled contact manipulation on the internal electric potential distribution of fluorinated zincphtalocyanine (F4ZnPc)/fullerene (C60) organic solar cells under operating conditions. In a detailed analytical study using photoelectron spectroscopy and in-operando scanning Kelvin probe microscopy it is demonstrated that the electric field distribution of organic solar cells at the maximum power point depends in an overproportional manner on contact properties and ranges from bulk to contact dominated even for solar cells with decent device performance. (ii) The morphology of co-evaporated active layer blends depends on both substrate and substrate temperature. Here we study the morphology of F4ZnPc:C60 blends with analytical transmission electron microscopy. For all substrates used is found that co-evaporation of the materials at elevated substrate temperature (100° Cel) induces a distinct phase segregation of F4ZnPc and C60. However, only when using a C60 underlayer, as in inverted devices, also the crystallinity of the segregated C60 phase increases. There is only a slight increase in crystallinity when F4ZnPc acts as an underlayer, as typically for non-inverted devices. Solar cell characterization reveals that the crystalline C60 domains are the main driving force for enhanced free charge carrier generation and higher power conversion efficiencies. With this we could provide a novel explanation why record efficiencies of small molecule organic solar cells are realized in inverted device architecture only.

Bulletin Of The Atomic Scientists

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Author :
language : en
Publisher:
Release Date : 1961-05

Bulletin Of The Atomic Scientists written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1961-05 with categories.

The Bulletin of the Atomic Scientists is the premier public resource on scientific and technological developments that impact global security. Founded by Manhattan Project Scientists, the Bulletin's iconic "Doomsday Clock" stimulates solutions for a safer world.

Energy Research Abstracts

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Author :
language : en
Publisher:
Release Date : 1986

Energy Research Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with Power resources categories.

Semiannual, with semiannual and annual indexes. References to all scientific and technical literature coming from DOE, its laboratories, energy centers, and contractors. Includes all works deriving from DOE, other related government-sponsored information, and foreign nonnuclear information. Arranged under 39 categories, e.g., Biomedical sciences, basic studies; Biomedical sciences, applied studies; Health and safety; and Fusion energy. Entry gives bibliographical information and abstract. Corporate, author, subject, report number indexes.

2000 International Chemical Congress Of Pacific Basin Societies

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Author :
language : en
Publisher:
Release Date : 2000

2000 International Chemical Congress Of Pacific Basin Societies written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with Chemistry categories.

Scientific And Technical Aerospace Reports

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Author :
language : en
Publisher:
Release Date : 1968

Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1968 with Aeronautics categories.

Biomedical Index To Phs Supported Research

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Author :
language : en
Publisher:
Release Date : 1988

Biomedical Index To Phs Supported Research written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with Medicine categories.

Research Awards Index

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Author :
language : en
Publisher:
Release Date : 1989

Research Awards Index written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with Medicine categories.

Index To Theses With Abstracts Accepted For Higher Degrees By The Universities Of Great Britain And Ireland And The Council For National Academic Awards

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Author :
language : en
Publisher:
Release Date : 2008

Index To Theses With Abstracts Accepted For Higher Degrees By The Universities Of Great Britain And Ireland And The Council For National Academic Awards written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with Dissertations, Academic categories.

Nuclear Science Abstracts

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Author :
language : en
Publisher:
Release Date : 1967

Nuclear Science Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1967 with Nuclear energy categories.

Bibliography Of Agriculture

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Author :
language : en
Publisher:
Release Date : 1991

Bibliography Of Agriculture written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with Agriculture categories.