Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/106801
Title: Charge dynamics in alkanedithiols-additives in P3HT : PCBM bulk heterojunction solar cells
Authors: Solanki, Ankur
Wu, Bo
Lam, Yeng Ming
Sum, Tze Chien
Keywords: DRNTU::Science::Physics::Optics and light
Issue Date: 2014
Source: 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.
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%).
URI: https://hdl.handle.net/10356/106801
http://hdl.handle.net/10220/25114
DOI: 10.1117/12.2061434
Rights: © 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.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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