Charge dynamics in alkanedithiols-additives in P3HT : PCBM bulk heterojunction solar cells

Addition of a small fraction of high boiling point solvent into the host of donor/acceptor blend is one the best approach to control the morphology in order to enhance the power conversion efficiency of organic bulk heterojunction (BHJ) solar cell devices. Herein, we focus on the effect of two thiol...

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Main Authors: Solanki, Ankur, Wu, Bo, Lam, Yeng Ming, Sum, Tze Chien
Other Authors: Kafafi, Zakya H.
Format: Conference or Workshop Item
Language:English
Published: 2015
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Online Access:https://hdl.handle.net/10356/106801
http://hdl.handle.net/10220/25114
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Institution: Nanyang Technological University
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spelling sg-ntu-dr.10356-1068012021-01-05T07:42:31Z Charge dynamics in alkanedithiols-additives in P3HT : PCBM bulk heterojunction solar cells Solanki, Ankur Wu, Bo Lam, Yeng Ming Sum, Tze Chien Kafafi, Zakya H. Lane, Paul A. Samuel, Ifor D. W. School of Materials Science & Engineering School of Physical and Mathematical Sciences SPIE 9184, Organic Photovoltaics XV Energy Research Institute @ NTU (ERI@N) DRNTU::Science::Physics::Optics and light Addition of a small fraction of high boiling point solvent into the host of donor/acceptor blend is one the best approach to control the morphology in order to enhance the power conversion efficiency of organic bulk heterojunction (BHJ) solar cell devices. Herein, we focus on the effect of two thiol-based additives (1,6-hexanedithiol (HDT) and 1,5-pentanedithiol (PDT)) on the charge dynamics of P3HT:PCBM blend system, studied by transient absorption spectroscopy (TAS) and correlated with the solar cell device performance. TAS reveals a more efficient charge generation and polaron formation in the systems with additives as compared to those without (NA systems), at the onset which persists up to few microseconds. The recombination dynamics also exhibits the reduced recombination losses on adding these additives in this system; however, there is marginal change of recombination dynamics in PDT added system with the control. These charge dynamics were validated using the analytical model proposed in our previous work and also correlated with improved device performance (ηNA = 0.9%, ηHDT = 2.7%, ηPDT = 1.6%). Published version 2015-02-26T04:46:06Z 2019-12-06T22:18:39Z 2015-02-26T04:46:06Z 2019-12-06T22:18:39Z 2014 2014 Conference Paper Solanki, A., Wu, B., Lam, Y. M., & Sum, T. C. (2014). Charge dynamics in alkanedithiols-additives in P3HT : PCBM bulk heterojunction solar cells. Proceedings of SPIE 9184, Organic Photovoltaics XV, 9184. https://hdl.handle.net/10356/106801 http://hdl.handle.net/10220/25114 10.1117/12.2061434 en © 2014 Society of Photo-optical Instrumentation Engineers. This paper was published in Proceedings of SPIE 9184, Organic Photovoltaics XV and is made available as an electronic reprint (preprint) with permission of Society of Photo-optical Instrumentation Engineers. The paper can be found at the following official DOI: [http://dx.doi.org/10.1117/12.2061434].  One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law. 10 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Science::Physics::Optics and light
spellingShingle DRNTU::Science::Physics::Optics and light
Solanki, Ankur
Wu, Bo
Lam, Yeng Ming
Sum, Tze Chien
Charge dynamics in alkanedithiols-additives in P3HT : PCBM bulk heterojunction solar cells
description Addition of a small fraction of high boiling point solvent into the host of donor/acceptor blend is one the best approach to control the morphology in order to enhance the power conversion efficiency of organic bulk heterojunction (BHJ) solar cell devices. Herein, we focus on the effect of two thiol-based additives (1,6-hexanedithiol (HDT) and 1,5-pentanedithiol (PDT)) on the charge dynamics of P3HT:PCBM blend system, studied by transient absorption spectroscopy (TAS) and correlated with the solar cell device performance. TAS reveals a more efficient charge generation and polaron formation in the systems with additives as compared to those without (NA systems), at the onset which persists up to few microseconds. The recombination dynamics also exhibits the reduced recombination losses on adding these additives in this system; however, there is marginal change of recombination dynamics in PDT added system with the control. These charge dynamics were validated using the analytical model proposed in our previous work and also correlated with improved device performance (ηNA = 0.9%, ηHDT = 2.7%, ηPDT = 1.6%).
author2 Kafafi, Zakya H.
author_facet Kafafi, Zakya H.
Solanki, Ankur
Wu, Bo
Lam, Yeng Ming
Sum, Tze Chien
format Conference or Workshop Item
author Solanki, Ankur
Wu, Bo
Lam, Yeng Ming
Sum, Tze Chien
author_sort Solanki, Ankur
title Charge dynamics in alkanedithiols-additives in P3HT : PCBM bulk heterojunction solar cells
title_short Charge dynamics in alkanedithiols-additives in P3HT : PCBM bulk heterojunction solar cells
title_full Charge dynamics in alkanedithiols-additives in P3HT : PCBM bulk heterojunction solar cells
title_fullStr Charge dynamics in alkanedithiols-additives in P3HT : PCBM bulk heterojunction solar cells
title_full_unstemmed Charge dynamics in alkanedithiols-additives in P3HT : PCBM bulk heterojunction solar cells
title_sort charge dynamics in alkanedithiols-additives in p3ht : pcbm bulk heterojunction solar cells
publishDate 2015
url https://hdl.handle.net/10356/106801
http://hdl.handle.net/10220/25114
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