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

Ankur Solanki; Bo Wu; Yeng Ming Lam; Tze Chien Sum

doi:10.1117/12.2061434

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

Ankur Solanki, Bo Wu, Yeng Ming Lam, Tze Chien Sum

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

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 (η_NA = 0.9%, η_HDT = 2.7%, η_PDT = 1.6%).

Original language	English
Title of host publication	Organic Photovoltaics XV
Editors	Zakya H. Kafafi, Paul A. Lane, Ifor D. W. Samuel
Publisher	SPIE
ISBN (Electronic)	9781628412116
DOIs	https://doi.org/10.1117/12.2061434
Publication status	Published - 2014
Externally published	Yes
Event	Organic Photovoltaics XV - San Diego, United States Duration: Aug 19 2014 → Aug 21 2014

Publication series

Name	Proceedings of SPIE - The International Society for Optical Engineering
Volume	9184
ISSN (Print)	0277-786X
ISSN (Electronic)	1996-756X

Conference

Conference	Organic Photovoltaics XV
Country/Territory	United States
City	San Diego
Period	8/19/14 → 8/21/14

Bibliographical note

Publisher Copyright:
© 2014 SPIE.

ASJC Scopus Subject Areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Computer Science Applications
Applied Mathematics
Electrical and Electronic Engineering

Access to Document

10.1117/12.2061434

Cite this

@inproceedings{4591e700875d45e992239a94a9f740f5,

title = "Charge dynamics in alkanedithiols-additives in P3HT:PCBM bulk heterojunction solar cells",

abstract = "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%).",

author = "Ankur Solanki and Bo Wu and Lam, {Yeng Ming} and Sum, {Tze Chien}",

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year = "2014",

doi = "10.1117/12.2061434",

language = "English",

series = "Proceedings of SPIE - The International Society for Optical Engineering",

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Solanki, A, Wu, B, Lam, YM & Sum, TC 2014, Charge dynamics in alkanedithiols-additives in P3HT:PCBM bulk heterojunction solar cells. in ZH Kafafi, PA Lane & IDW Samuel (eds), Organic Photovoltaics XV., 91841F, Proceedings of SPIE - The International Society for Optical Engineering, vol. 9184, SPIE, Organic Photovoltaics XV, San Diego, United States, 8/19/14. https://doi.org/10.1117/12.2061434

Charge dynamics in alkanedithiols-additives in P3HT:PCBM bulk heterojunction solar cells. / Solanki, Ankur; Wu, Bo; Lam, Yeng Ming et al.
Organic Photovoltaics XV. ed. / Zakya H. Kafafi; Paul A. Lane; Ifor D. W. Samuel. SPIE, 2014. 91841F (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 9184).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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N2 - 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%).

AB - 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%).

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

Abstract

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