Nanocrystal growth and improved performance of small molecule bulk heterojunction solar cells composed of a blend of chloroaluminum phthalocyanine and C70

Kentaro Harada, Tomohiko Edura, Chihaya Adachi

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Improved performance from organic bulk heterojunction (BHJ) solar cells composed of a blend of chloroaluminum phthalocyanine (ClAlPc) and fullerene C70 is demonstrated. The deep highest occupied molecular orbital of ClAlPc and the broad absorption of C70 lead to a high open-circuit voltage and a high short-circuit current density (JSC). A change in the intermolecular arrangement of ClAlPc is observed when the substrate is heated to 370-390 K during deposition of the blend layer, indicating the growth of π-stacked nanocrystals of ClAlPc. Consequently, JSC and the fill factor are enhanced significantly, and a high power conversion efficiency of 4.1% is obtained.

Original languageEnglish
Article number121602
JournalApplied Physics Express
Volume3
Issue number12
DOIs
Publication statusPublished - Dec 1 2010

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

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