Reconsidering figures of merit for performance and stability of perovskite photovoltaics
Khenkin, Mark V. (Ben-Gurion University of the Negev)
Anoop, K. M. (Ben-Gurion University of the Negev)
Visoly-Fisher, Iris (Ben-Gurion University of the Negev)
Galagan, Yulia (Holst Centre-Solliance)
Di Giacomo, Francesco (Holst Centre-Solliance)
Patil, Bhushan R. (University of Southern Denmark)
Sherafatipour, Golnaz (University of Southern Denmark)
Turkovic, Vida (University of Southern Denmark)
Rubahn, Horst-Günter (University of Southern Denmark)
Madsen, Morten (University of Southern Denmark)
Merckx, Tamara (IMEC-a Partner in Solliance)
Uytterhoeven, Griet (IMEC-a Partner in Solliance)
Bastos, João P. A. (KU Leuven)
Aernouts, Tom (IMEC-a Partner in Solliance)
Brunetti, Francesca (University of Rome Tor Vergata)
Lira-Cantu, Monica (Institut Català de Nanociència i Nanotecnologia)
Katz, Eugene A. (Ben-Gurion University of the Negev)

Data:	2018
Resum:	The development of hybrid organic-inorganic halide perovskite solar cells (PSCs) that combine high performance and operational stability is vital for implementing this technology. Recently, reversible improvement and degradation of PSC efficiency have been reported under illumination-darkness cycling. Quantifying the performance and stability of cells exhibiting significant diurnal performance variations is challenging. We report the outdoor stability measurements of two types of devices showing either reversible photo-degradation or reversible efficiency improvement under sunlight. Instead of the initial (or stabilized) efficiency and T as the figures of merit for the performance and stability of such devices, we propose using the value of the energy output generated during the first day of exposure and the time needed to reach its 20% drop, respectively. The latter accounts for both the long-term irreversible degradation and the reversible diurnal efficiency variation and does not depend on the type of process prevailing in a given perovskite cell.
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Efficiency improvement ; Figures of merits ; Hybrid organic-inorganic ; Irreversible degradation ; Operational stability ; Performance variations ; Photovoltaics ; Stability measurements
Publicat a:	Energy & environmental science, Vol. 11, Issue 4 (April 2018) , p. 739-743, ISSN 1754-5706

DOI: 10.1039/c7ee02956j

5 p, 2.2 MB

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