A Geometrically Well-Defined and Systematically Tunable Experimental Model to Transition from Planar to Mesoporous Perovskite Solar Cells

Döhler D, Büttner P, Scheler F, Thiel D, Puscher B, Bochmann S, Mitrovic J, Boix PP, Guldi DM, Minguez-Bacho I, Bachmann J (2022)

Publication Type: Journal article

Publication year: 2022

Journal

ACS Applied Energy Materials American Chemical Society

DOI: 10.1021/acsaem.2c00870

Abstract

A series of perovskite solar cells with systematically varying surface area of the interface between n-type electron conducting layer (TiO2) and perovskite are prepared by using an ordered array of straight, cylindrical nanopores generated by anodizing an aluminum layer evaporated onto a transparent conducting electrode. A series of samples with pore length varied from 100 to 500 nm are compared to each other and complemented by a classical planar cell and a mesoporous counterpart. All samples are characterized in terms of morphology, chemistry, optical properties, and performance. All samples absorb light to the same degree, and the increased interface area does not generate enhanced recombination. However, the short circuit current density increases monotonically with the specific surface area, indicating improved charge extraction efficiency. The importance of the slow interfacial rearrangement of ions associated with planar perovskite cells is shown to decrease in a systematic manner as the interfacial surface area increases. The results demonstrate that planar and mesoporous cells obey to the same physical principles and differ from each other quantitatively, not qualitatively. Additionally, the study shows that a significantly lower TiO2 surface area compared to mesoporous TiO(2 )is needed for an equal charge extraction.

Authors with CRIS profile

Dirk Döhler Lehrstuhl für Chemistry of thin film materials Pascal Büttner Lehrstuhl für Chemistry of thin film materials Florian Scheler Lehrstuhl für Chemistry of thin film materials Dominik Thiel Lehrstuhl für Physikalische Chemie I Bianka Puscher Lehrstuhl für Physikalische Chemie I Sebastian Bochmann Lehrstuhl für Chemistry of thin film materials Julian Mitrovic Lehrstuhl für Organische Chemie II Dirk Michael Guldi Lehrstuhl für Physikalische Chemie I Julien Bachmann Lehrstuhl für Chemistry of thin film materials

Additional Organisation(s)

Interdisziplinäres Zentrum für Molekulare Materialien

Involved external institutions

University of València / Universitat de València ES Spain (ES)

How to cite

APA:

Döhler, D., Büttner, P., Scheler, F., Thiel, D., Puscher, B., Bochmann, S.,... Bachmann, J. (2022). A Geometrically Well-Defined and Systematically Tunable Experimental Model to Transition from Planar to Mesoporous Perovskite Solar Cells. ACS Applied Energy Materials. https://dx.doi.org/10.1021/acsaem.2c00870

MLA:

Döhler, Dirk, et al. "A Geometrically Well-Defined and Systematically Tunable Experimental Model to Transition from Planar to Mesoporous Perovskite Solar Cells." ACS Applied Energy Materials (2022).

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