Temperature Impact on Perovskite Solar Cells Under Operation

• Type: Article in International Scientific Journal
• Date: 2019-02

Authors

Isabel Mesquita (Author) FEUP; Luísa Andrade (Author) FEUP; Adélio Mendes (Author) FEUP

Journal

Title: ChemSusChem

Vol. 12 No. 10

Pages: 2186-2194

ISSN: 1864-5631

Publisher: Wiley-Blackwell

Indexing

ISI Web of Knowledge - 0 Citations

ISI Web of Science

Scopus - 28 Citations

INSPEC

Associated Projects

LEPABE - Laboratório de Engenharia de Processos, Ambiente, Biotecnologia e Energia

SolarPerovskite - Novos avanços tecnológicos para as células solares de perovskita de alta eficiência

BI-DSC - Building Integrated Dye Sensitized Solar Cells

WINPSC - Novos avanços tecnológicos para a terceira geração de células solares sensibilizadas com perovskita

LEPABE-2-ECO-INNOVATION - LEPABE-2-ECO-INNOVATION

Other information

Authenticus ID: P-00Q-FGJ

DOI: 10.1002/cssc.201802899

Abstract (EN): Perovskite solar cells (PSC) have emerged as a promising substitute for conventional silicon panels, showing the fastest power conversion efficiency evolution within the photovoltaic field, going from 3.8% to 23.7% in a few years. However, PSC thermal stability is still an obstacle to their commercialization. In this study, the temperature effect on mesoporous triple-cation perovskite solar cells with two different hole extraction materials2,2,7,7-tetrakis(N,N-di-p-methoxyphenylamine)-9,9-spirobifluorene (spiro-OMeTAD) and poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] (PTAA)is assessed. The cells are exposed to thermal stress between -5 degrees C and 80 degrees C and their photovoltaic performance is monitored in situ to reproduce real operating conditions. At low temperatures, the devices present very stable values (average loss <5%), but as the temperature increases significant decreases in the open circuit potential and short-circuit current are observed. X-ray diffraction shows no change in the perovskite crystal structure with temperature. However, electron scanning microscopy and X-ray photoelectron spectroscopy indicate that temperature has a great impact on the hole extraction layer. The cell performance loss is attributed to the evaporation of additives added to the hole extraction layer to enhance its conductivity. Although the decrease in power conversion efficiency at 80 degrees C is slightly higher for PTAA cells, spiro-OMeTAD cells present a higher irreversible loss of (21.6 +/- 2.3)% after thermal stress tests, whereas PTAA devices showed only a loss of (8.2 +/- 1.6)%.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9