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journal article·2022-02-01Open access

Understanding the effects of annealing temperature on the mechanical properties of layers in FAI-rich perovskite solar cells

O. V. Oyelade, O. K. Oyewole, Y. A. Olanrewaju, R. Ichwani, R. Koech, D. O. Oyewole, S. A. Adeniji, D. M. Sanni, J. Cromwell, R. A. Ahmed, K. Orisekeh, V. C. Anye, W. O. Soboyejo

AIP Advances· Volume 12· Issue 2
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Source abstract

Abstract

This paper uses a combination of experiments and theory to study the effects of annealing temperature on the mechanical properties of hybrid organic–inorganic perovskites (HOIPs). We examined the mechanical (hardness and Young’s modulus), microstructural, and surface topography properties of the HOIP film at different annealing temperatures ranging from 80 to 170 °C. A mechanism-based strain gradient (MSG) theory is used to explain indentation size effects in films at different annealing temperatures. Intrinsic film yield strengths and hardness values (deduced from the MSG theory) are then shown to exhibit a Hall–Petch dependence on the inverse square root of the average grain size. The implications of the results are then discussed for the design of mechanically robust perovskite solar cells.
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Research context

Electronic materialsMaterials processing

OpenAlex topics: Perovskite Materials and Applications · Conducting polymers and applications · Organic Electronics and Photovoltaics

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Theoretical and Applied Physics, African University of Science and Technology 1 , Km. 10 Airport Road, Galadimawa, P.M.B. 186, Garki-Abuja, Federal Capital Territory, Nigeria

Department of Physics, Bingham University 2 , Km. 26 Abuja Keffi Express Way, P.M.B. 005, Karu, Nasarawa State, Nigeria

Materials Science and Engineering Program, Department of Mechanical Engineering, Worcester Polytechnic Institute 3 , 100 Institute Road, Worcester, Massachusetts 01609, USA

Department of Mechanical Engineering, Worcester Polytechnic Institute 4 , 100 Institute Road, Worcester, Massachusetts 01609, USA

Department of Material Science, African University of Science and Technology 5 , Km. 10 Airport Road, Galadimawa, P.M.B. 186, Garki-Abuja, Federal Capital Territory, Nigeria

Funding

Worcester Polytechnic Institute · African University of Science and Technology · Pan African Materials Institute

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