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Polymer/polymer blends in organic photovoltaic and photodiode devices
Organic photovoltaics devices (OPV) have attracted attentions of scientist for their potential as inexpensive, lightweight, flexible and suitable for roll-to-roll production. In recent years, considerable attention has been focused on new acceptor materials, either polymeric or small molecules, to replace the once dominating fullerene derivatives. The emergence of numerous new non-fullerene materials has driven power conversion efficiency (PCE) up to 17%, attracting more and more interests of commercialization. Polymer acceptors with more morphology stability, more absorption and more desired energy levels has been intensively studied and show great potential for large area and low-cost prod...
Electronic Structure of ?-Conjugated Materials and Their Effect on Organic Photovoltaics
The great tunability of structure and electronic properties of ?-conjugated organic molecules/polymers combined with other advantages such as light weight and flexibility etc., have made organic-based electronics the focus of an exciting still-growing field of physics and chemistry for more than half a century. The application of organic electronics has led to the appearance of wide range of organic electronic devices mainly including organic light emitting diodes (OLED), organic field effect transistors (OFET) and organic solar cells (OSC). The application of the organic electronic devices mainly is limited by two dominant parameters, i.e., their performance and stability. Up to date, OLED ...
Organic electronic devices for solar energy conversion and storage
This thesis focuses on two types of organic electronic devices: organic photovoltaic (OPV) devices for solar energy conversion, and photo-capacitors for energy storage. OPVs have been under the focus of research for decades as an effective technique to convert solar energy to electricity. So far, the efficiency of bulk heterojunction OPV consisting donor and acceptor materials is approaching to 18% with non-fullerene acceptor (NFA), which make it close to commercialization. The process of charge generation and recombination are two competing processes in OPVs, since their requirements for the active layer morphology are contradictory. Large donor/acceptor interfaces facilitate charge generat...
Renewable and Scalable Energy Storage Materials Derived from Quinones in Biomass
Currently there is an urgent need to reduce the use of fossil fuels, and efficient sustainable energy harvesters from sun and wind have been developed and are widely used for electricity generation. Storage of electrical energy is accordingly necessary to accommodate the time varying supply of wind and solar electricity. Quinones (Q) are attractive as energy storage materials due to their high theoretical charge density and the renewable and abundant source – biomass. Plant-based biomass materials – such as lignin and humic acids – contain redox active Q-groups that potentially could be used for electricity storage instead of simply burning the biomass, which releases CO2, CH4, NOx, an...
Effects of Energetic Disorder on the Optoelectronic Properties of Organic Solar Cells
Organic photovoltaics (OPVs) is a promising low-cost and environmental-friendly technology currently achieving 12-14% power conversion efficiency. Despite the extensive focus of the research community over the last years, critical mechanisms defining the performance of OPVs are still topics of debate. While energetic disorder is known to be characteristic of organic semiconductors in general, its potential role in OPV has received surprisingly little attention. In this thesis we investigate some aspects of the relation between energetic disorder and several optoelectronic properties of OPV. Charge carrier mobility is a key parameter in characterizing the performance of organic semiconductors...
Don't Worry, My Boss Husband
"A childhood sweetheart for thirteen years, the bride isn't her!" "Ye Beichen, I hate you —" "Shhh!" "Stop messing around, go to sleep!" "Four years later, the chubby girl became a goddess and was able to wake up a vegetable with a single needle. From now on, she would be surrounded by demons!" Young Master Ye, we have nothing to do with each other since a long time ago! " [Previous Chapter] [Table of Contents] [Next Chapter] It used to be, it is now, and it will be in the future. I won't let you off even in my next life!
Billionaire Husband, Tantalize Me Tenderly
"A childhood sweetheart for thirteen years, the bride isn't her!" "Ye Beichen, I hate you —""Shh!" "Stop messing around!""Four years later, the chubby girl became a goddess and was able to wake up a vegetable with a single needle. From now on, she would be surrounded by demons!" Young Master Ye, we have nothing to do with each other since a long time ago! "PS: xia xiaomei, you are my woman! Was, is, will be, even next life I will not let you off!
Aloof Master Can't Hold Himself
"The bride was abandoned by the groom at the wedding, and the bride said something fierce on the spot. I will marry whoever marries me." "I'll marry her." He had never expected that the man who had stood up was actually the brother of the groom ... She had lost her body and her heart, and finally she knew that she had married her only to save the little bit of cinnabar in his heart, and how could this farce of a marriage end?
