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

12 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 2010

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Molecular orbitals
Open circuit voltage
Fullerenes
Short circuit currents
Nanocrystals
Conversion efficiency
Heterojunctions
heterojunctions
Solar cells
nanocrystals
Current density
solar cells
Molecules
Substrates
short circuit currents
open circuit voltage
fullerenes
molecules
high voltages
molecular orbitals

All Science Journal Classification (ASJC) codes

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

Cite this

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title = "Nanocrystal growth and improved performance of small molecule bulk heterojunction solar cells composed of a blend of chloroaluminum phthalocyanine and C70",
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.",
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AU - Adachi, Chihaya

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AB - 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.

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