Ligand chemistry of titania precursor affects transient photovoltaic behavior in inverted organic solar cells

Title
Ligand chemistry of titania precursor affects transient photovoltaic behavior in inverted organic solar cells
Authors
김종복안석훈강석주Colin NuckollsYueh-Lin Loo
Keywords
solar cells; photovoltaic
Issue Date
2013-03
Publisher
Applied physics letters
Citation
VOL 102, NO 10, 103302-1-103302-4
Abstract
The chemistry of the precursor from which charge transport layers are formed can significantly affect the device performance of organic solar cells. Here, we compare two common precursors that are used to generate titania electron transport layers and elucidate their effects on the transient characteristics of inverted bulk-heterojunction polymer solar cells comprising poly(3-hexyl hiophene) and [6,6]-phenyl-C61-butyric acid methyl ester. Substituting the isopropyl ligands of titanium isopropoxide with 2-methoxyethanol leads to electron transport layers that require a shorter illumination time to fill shallow electron traps. Furthermore, organic solar cells with titania electron transport layers prepared with such pre-modified titania precursor exhibit higher powerconversion efficiencies stemming from lower trap densities.
URI
http://pubs.kist.re.kr/handle/201004/45133
ISSN
00036951
Appears in Collections:
KIST Publication > Article
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