| Title |
Charge Transport and Novel Poly(fullerene)s in Organic Photovoltaics / |
| Translation of Title |
Krūvio pernaša ir naujieji polifulerenai organinėse fotovoltinėse sistemose. |
| Authors |
Stephen, Meera |
| Full Text |
|
| Pages |
167 |
| Keywords [eng] |
Organic photovoltaics ; Organic semiconductors ; Fullerenes and related materials: Chemical synthesis methods |
| Abstract [eng] |
Organic photovoltaics (OPV) present us with a new breed of coatable, semitransparent, potentially cheap, flexible photovoltaics that can be used in many applications where traditional photovoltaics cannot compete. Any progress in this field calls for the close cooperation of chemists and physicists owing to its very nature of interdisciplinarity. This dissertation comprises of two distinct but interconnected topics. The first part consists of a detailed study of degradation behavior of working organic solar cell devices on prolonged exposure to simulated sunlight. Photo-induced charge carrier extraction by linearly increasing voltage (photo-CELIV) and time of flight (TOF) techniques are made use of to deduce the effects of photo-degradation on bulk charge transport in devices based on poly-3-hexylthiophene and benzodithiophene – diketopyrrolopyrrole polymers. A second part of this work deals with synthesis of novel poly(fullerene)s for photovoltaic applications. A recently discovered route where the use of sterically cumbersome groups provided for a certain degree of control over the additions to the fullerene sphere is explored to provide for main-chain poly(fullerene)s. These novel materials are tested for photovoltaic efficiencies and thermal stabilities in bulk heterojunction devices. |
| Dissertation Institution |
Vilniaus universitetas. |
| Type |
Doctoral thesis |
| Language |
English |
| Publication date |
2016 |
