Skip to content

Research at St Andrews

Triptycene as a supramolecular additive in PTB7:PCBM blends and its influence on photovoltaic properties

Research output: Contribution to journalArticlepeer-review

Author(s)

Lethy Krishnan Jagadamma, Liam McCarron, Alan A. Wiles, Victoria Savikhin, Muhammad Tariq Sajjad, Mahdieh Yazdani, Vincent M Rotello, Michael F Toney, Graeme Cooke, Ifor D. W. Samuel

School/Research organisations

Abstract

Additives play an important role in modifying the morphology and phase separation of donor and acceptor molecules in bulk heterojunction (BHJ) solar cells. Here, we report triptycene (TPC) as a small-molecule additive for supramolecular control of phase separation and concomitant improvement of the power conversion efficiency (PCE) of PTB7 donor and fullerene acceptor-based BHJ polymer solar cells. An overall 60% improvement in PCE is observed for both PTB7:PC61BM and PTB7:PC71BM blends. The improved photovoltaic (PV) performance can be attributed to three factors: (a) TPC-induced supramolecular interactions with donor:acceptor components in the blends to realize a nanoscale phase-separated morphology; (b) an increase in the charge transfer state energy that lowers the driving force for electron transfer from donor to acceptor molecules; and (c) an increase in the charge carrier mobility. An improvement in efficiency using TPC as a supramolecular additive has also been demonstrated for other BHJ blends such as PBDB-T:PC71BM and P3HT:PCBM, implying the wide applicability of this new additive molecule. A comparison of the photostability of TPC as an additive for PTB7:PCBM solar cells to that of the widely used 1,8-diiodooctane additive shows ∼30% higher retention of PV performance for the TPC-added solar cells after 34 h of AM 1.5G illumination. The results obtained suggest that the approach of using additives that can promote supramolecular interactions to modify the length scale of phase separation between donor and acceptor is very promising and can lead to the development of highly efficient and stable organic photovoltaics.
Close

Details

Original languageEnglish
Pages (from-to)24665-24678
JournalACS Applied Materials & Interfaces
Volume10
Issue number29
Early online date22 Jun 2018
DOIs
Publication statusPublished - 25 Jul 2018

Discover related content
Find related publications, people, projects and more using interactive charts.

View graph of relations

Related by author

  1. Organic photovoltaics for simultaneous energy harvesting and high-speed MIMO optical wireless communications

    Tavakkolnia, I., Krishnan Jagadamma, L., Bian, R., Manousiadis, P., Videv, S., Turnbull, G., Samuel, I. D. W. & Haas, H., 23 Feb 2021, In: Light: Science & Applications. 10, 11 p., 41.

    Research output: Contribution to journalArticlepeer-review

  2. Triple-cation perovskite solar cells for visible light communications

    Mica, N., Bian, R., Manousiadis, P., Krishnan Jagadamma, L., Tavakklolnia, I., Haas, H., Turnbull, G. & Samuel, I. D. W., 1 Aug 2020, In: Photonics Research. 8, 8, p. A16-A24 9 p.

    Research output: Contribution to journalArticlepeer-review

  3. Long-range exciton diffusion in non-fullerene acceptors and coarse bulk heterojunctions enable highly efficient organic photovoltaics

    Sajjad, M. T., Ruseckas, A., Jagadamma, L. K., Zhang, Y. & Samuel, I. D. W., 21 Jul 2020, In: Journal of Materials Chemistry. 8, 31, p. 15687-15694 8 p.

    Research output: Contribution to journalArticlepeer-review

Related by journal

  1. Thermally activated delayed fluorescence emitters with intramolecular proton transfer for high luminance solution-processed organic light-emitting diodes

    Gupta, A., Li, W., Ruseckas, A., Lian, C., Carpenter-Warren, C. L., Cordes, D. B., Slawin, A. M. Z., Jacquemin, D., Samuel, I. D. W. & Zysman-Colman, E., 30 Mar 2021, In: ACS Applied Materials & Interfaces. Articles ASAP

    Research output: Contribution to journalArticlepeer-review

  2. A highly efficient coordination polymer for selective trapping and sensing of perrhenate/pertechnetate

    Li, C-P., Zhou, H., Chen, J., Wang, J-J., Du, M. & Zhou, W., 1 Apr 2020, In: ACS Applied Materials & Interfaces. 12, 13, p. 15246-15254

    Research output: Contribution to journalArticlepeer-review

  3. Exsolution of catalytically active iridium nanoparticles from strontium titanate

    Calì, E., Kerherve, G., Naufal, F., Kousi, K., Neagu, D., Papaioannou, E. I., Thomas, M. P., Guiton, B. S., Metcalfe, I. S., Irvine, J. T. S. & Payne, D. J., 19 Aug 2020, In: ACS Applied Materials & Interfaces. 12, 33, p. 37444-37453 10 p.

    Research output: Contribution to journalArticlepeer-review

  4. Multifaceted study of the interactions between CPO-27-Ni and polyurethane and their impact on nitric oxide release performance

    Vornholt, S. M., Duncan, M. J., Warrender, S. J., Semino, R., Ramsahye, N. A., Maurin, G., Smith, M. W., Tan, J-C., Miller, D. N. & Morris, R. E., 30 Dec 2020, In: ACS Applied Materials & Interfaces. 12, 52, p. 58263-58276

    Research output: Contribution to journalArticlepeer-review

  5. Promoting electrocatalytic activity and stability via Er0.4Bi1.6O3−δ in situ decorated La0.8Sr0.2MnO3−δ oxygen electrode in reversible solid oxide cell

    Liu, Y., Tian, Y., Wang, W., Li, Y., Chattopadhyay, S., Chi, B. & Pu, J., 30 Dec 2020, In: ACS Applied Materials & Interfaces. 12, 52, p. 57941-57949 9 p.

    Research output: Contribution to journalArticlepeer-review

ID: 251545045

Top