Development of Conjugated Polymers and Devices for High Performance Large-Area Organic Photovoltaics

Organic photovoltaics (OPVs) have advantages in that they are lightweight and flexible and prepared by cost effective roll-to-roll coating and printing techniques. OPV efficiency close to 19% was reported in a small cell, which showing the great potential of OPV technology as an alternative source of green energy. To further develop OPVs from lab-scale researches into industrial applications, OPV technology prepared at a small area needs to be transferred to a large scale such as modules. It is highly important to develop new organic materials including conjugated polymers and understand the fundamental working mechanism of the organic materials. In this presentation, we developed new conjugated polymers for large-area OPV and studied the working mechanism of organic materials and photovoltaic performance in large area OPVs. We successfully transferred the material and device technologies realized at a small area below 0.2 cm2 into a large area of 60 cm2 using non-spin-coating methods. This presentation will introduce the relationship of organic materials and photovoltaic properties of large-area OPV devices.