Nano-scale mechanical properties of polymer/fullerene bulk hetero-junction films and their influence on photovoltaic cells

Hung Chang Li, K. Koteswara Rao, Jun Yuan Jeng, Yu Jer Hsiao, Tzung Fang Guo, Yean Ren Jeng, Ten Chin Wen

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Mechanical properties of poly(3-hexylthiophene) (P3HT)/[6,6]-phenyl-C61- butyric acid methyl ester (PCBM) blend films, prepared under different processing conditions, were evaluated by nanoindentation. Photovoltaic devices fabricated using above active layers presented the highest power conversion efficiencies for blend films having lowest Young's modulus (20.73 GPa) and hardness (649 MPa), as measured by a nanoidentator under optimized conditions of blend proportion (1:1), film drying rate (slow) and annealing temperature and time (110 °C and 10 min). It implies that the degree of nano-scale phase separation for the P3HT:PCBM blend is strongly correlated with the mechanical properties in the nanodimension. The nanoindentation is a method to estimate nano-scale mechanical properties of blend films and the performance of photovoltaic cells.

Original languageEnglish
Pages (from-to)2976-2980
Number of pages5
JournalSolar Energy Materials and Solar Cells
Volume95
Issue number11
DOIs
Publication statusPublished - 2011 Nov

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films

Fingerprint Dive into the research topics of 'Nano-scale mechanical properties of polymer/fullerene bulk hetero-junction films and their influence on photovoltaic cells'. Together they form a unique fingerprint.

  • Cite this