Carrier Formation Dynamics of Organic Photovoltaics as Investigated by Time-Resolved Spectroscopy
Joint Authors
Yonezawa, Kouhei
Ito, Minato
Yasuda, Takeshi
Han, Liyuan
Moritomo, Yutaka
Kamioka, Hayato
Source
Advances in Optical Technologies
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-06-27
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Engineering Sciences and Information Technology
Abstract EN
Bulk heterojunction (BHJ) based on a donor (D) polymer and an acceptor (A) fullerene derivative is a promising organic photovoltaics (OPV).
In order to improve the incident photon-to-current efficiency (IPCE) of the BHJ solar cell, a comprehensive understanding of the ultrafast dynamics of excited species, such as singlet exciton (D*), interfacial charge-transfer (CT) state, and carrier (D+), is indispensable.
Here, we performed femtosecond time-resolved spectroscopy of two prototypical BHJ blend films: poly(3-hexylthiophene) (P3HT)/[6,6]-phenyl C61-butyric acid methyl ester (PCBM) blend film and poly(9,9′-dioctylfluorene-co-bithiophene) (F8T2)/[6,6]-phenyl C71-butyric acid methyl ester (PC70BM) blend film.
We decomposed differential absorption spectra into fast, slow, and constant components via two-exponential fitting at respective probe photon energies.
The decomposition procedure clearly distinguished photoinduced absorptions (PIAs) due to D*, CT, and D+.
Based on these assignments, we will compare the charge dynamics between the F8T2/PC70BM and P3HT/PCBM blend films.
American Psychological Association (APA)
Yonezawa, Kouhei& Ito, Minato& Kamioka, Hayato& Yasuda, Takeshi& Han, Liyuan& Moritomo, Yutaka. 2012. Carrier Formation Dynamics of Organic Photovoltaics as Investigated by Time-Resolved Spectroscopy. Advances in Optical Technologies،Vol. 2012, no. 2012, pp.1-10.
https://search.emarefa.net/detail/BIM-462874
Modern Language Association (MLA)
Yonezawa, Kouhei…[et al.]. Carrier Formation Dynamics of Organic Photovoltaics as Investigated by Time-Resolved Spectroscopy. Advances in Optical Technologies No. 2012 (2012), pp.1-10.
https://search.emarefa.net/detail/BIM-462874
American Medical Association (AMA)
Yonezawa, Kouhei& Ito, Minato& Kamioka, Hayato& Yasuda, Takeshi& Han, Liyuan& Moritomo, Yutaka. Carrier Formation Dynamics of Organic Photovoltaics as Investigated by Time-Resolved Spectroscopy. Advances in Optical Technologies. 2012. Vol. 2012, no. 2012, pp.1-10.
https://search.emarefa.net/detail/BIM-462874
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-462874