RELATIONSHIPS BETWEEN THE STRUCTURE, CHARGE TRANSPORT PROPERTIES AND PERFORMANCE OF HYBRID SOLAR CELLS BASED ON POLY(3-HEXYLTHIOPHENE) AND SEMICONDUCTOR NANOCRYSTALS

摘要

Using semiconductor nanoparticles such as CdSe nanocrystals as electron acceptors in polymer-based bulk heterojunction solar cells is a promising attempt to improve the absorption properties as well as electron transport in organic-based solar cells. However, the efficiency of such hybrid solar cells is still limited to about ～3%, i.e. below that of polymer/fullerene solar cells. This may partly be due to less advanced control over the morphology of nanoparticle/polymer films. In this work, a systematic study of correlations between the blend morphology, charge transport properties and device performance of hybrid solar cells made of poly(3-hexylthiophene) and CdSe nanoparticles is presented.