Author:
Kato Masahiro,Yoshizawa Hayato,Nakaya Masato,Kitagawa Yasutaka,Okamoto Koichi,Yamada Tomoaki,Yoshino Masahito,Tanaka Kentaro,Onoe Jun
Abstract
AbstractLead phthalocyanine (PbPc) is well known to be used as a good near-infrared (NIR) light absorber for organic solar cells (OSCs) and photodetectors. The monoclinic and triclinic phases have been understood to absorb the visible and NIR regions, respectively, so far. In the present study, we demonstrated from the absorption spectra and theoretical analysis that the visible band considerably originates from not only the monoclinic but also the amorphous and triclinic phases, and revealed the exciton dynamics in the PbPc film from static/time-resolved photoluminescence (PL), which are first reported. By comparing the external quantum efficiency between PbPc- and ZnPc-based OSCs in relation to their structure, morphology, and optical (absorption and PL) characteristics, we unraveled the reasons behind the PbPc film used as a good absorber for NIR-sensitive devices.
Funder
Japan Society for Aeronautical and Space Sciences
Japan Society for the Promotion of Science
Publisher
Springer Science and Business Media LLC
Cited by
4 articles.
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