首页 | 本学科首页   官方微博 | 高级检索  
     


Improved Power Conversion Efficiency of P3HT:PCBM Organic Solar Cells by Strong Spin–Orbit Coupling‐Induced Delayed Fluorescence
Authors:Daniel Moseguí González  Volker Körstgens  Yuan Yao  Lin Song  Gonzalo Santoro  Stephan V. Roth  Peter Müller‐Buschbaum
Affiliation:1. Lehrstuhl für Funktionelle Materialien, Physik‐Department, Technische Universit?t München, Garching, Germany;2. Deutsches Elektronen‐Synchrotron DESY, Hamburg, Germany
Abstract:Solution‐processed organic bulk heterojunction solar cells based on poly(3‐hexylthiophene) (P3HT) blended with [6,6]‐phenyl‐C60‐butyric acid methyl ester are doped with different concentrations of iron (II,III) oxide nanoparticles (Fe3O4). The power conversion efficiency of the devices doped at low concentrations is improved up to 11%. The improvement finds its origin in a lower recombination current, which is a consequence of an increased effective exciton lifetime according to the J–V characteristics and the optoelectronical analysis of the films. The increase in performance cannot be attributed to changes in morphology or crystallinity according to grazing‐incidence X‐ray scattering experiments. The evolution of the solar cell short‐circuit current at low doping concentrations is related to variations in the arrangement of the crystalline regions of P3HT. For high doping concentrations (above 1.0 wt%) the performance of the solar cell decays rapidly, ascribed to the increased leakage currents in the device caused by the presence of nanoparticles.
Keywords:GISAXS  GIWAXS  nanomorphology  nanoparticles  organic photovoltaics
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号