Extending the environmental lifetime of unpackaged perovskite solar cells through interfacial design
Artikel i vetenskaplig tidskrift, 2016

Solution-processed oxo-functionalized graphene (oxo-G1) is employed to substitute hydrophilic PEDOT:PSS as an anode interfacial layer for perovskite solar cells. The resulting devices exhibit a reasonably high power conversion efficiency (PCE) of 15.2% in the planar inverted architecture with oxo-G1 as a hole transporting material (HTM), and most importantly, deploy the full open-circuit voltage (Voc) of up to 1.1 V. Moreover, oxo-G1 effectively slows down the ingress of water vapor into the device stack resulting in significantly enhanced environmental stability of unpackaged cells under illumination with 80% of the initial PCE being reached after 500 h. Without encapsulation, ∼60% of the initial PCE is retained after ∼1000 h of light soaking under 0.5 sun and ambient conditions maintaining the temperature beneath 30 °C. Moreover, the unsealed perovskite device retains 92% of its initial PCE after about 1900 h under ambient conditions and in the dark. Our results underpin that controlling water diffusion into perovskite cells through advanced interface engineering is a crucial step towards prolonged environmental stability.

Författare

Haiwei Chen

Friedrich-Alexander-Universität Erlangen Nurnberg (FAU)

Yi Hou

Friedrich-Alexander-Universität Erlangen Nurnberg (FAU)

C. E. Halbig

Friedrich-Alexander-Universität Erlangen Nurnberg (FAU)

Shi Chen

Friedrich-Alexander-Universität Erlangen Nurnberg (FAU)

Hong Zhang

Friedrich-Alexander-Universität Erlangen Nurnberg (FAU)

Ning Li

Friedrich-Alexander-Universität Erlangen Nurnberg (FAU)

Fei Guo

Friedrich-Alexander-Universität Erlangen Nurnberg (FAU)

Xiaofeng Tang

Friedrich-Alexander-Universität Erlangen Nurnberg (FAU)

Nicola Gasparini

Friedrich-Alexander-Universität Erlangen Nurnberg (FAU)

Ievgen Levchuk

Friedrich-Alexander-Universität Erlangen Nurnberg (FAU)

Simon Kahmann

Friedrich-Alexander-Universität Erlangen Nurnberg (FAU)

Rijksuniversiteit Groningen

Cesar Omar Ramirez Quiroz

Friedrich-Alexander-Universität Erlangen Nurnberg (FAU)

Andres Osvet

Friedrich-Alexander-Universität Erlangen Nurnberg (FAU)

Siegfried Eigler

Chalmers, Kemi och kemiteknik, Kemi och biokemi, Organisk kemi

Christoph J. Brabec

Friedrich-Alexander-Universität Erlangen Nurnberg (FAU)

Das Bayerische Zentrum fur Angewandte Energieforschung e.V.

Journal of Materials Chemistry A

2050-7488 (ISSN)

Vol. 4 30 11604-11610

Ämneskategorier

Kemi

DOI

10.1039/c6ta03755k