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Encapsulated perovskite based photovoltaics devices with high stability

Published online by Cambridge University Press:  02 May 2016

Man Kwong Wong ,
Qi Dong ,
Fangzhou Liu ,
Aleksandra B. Djurišić ,
Wai Kin Chan ,
Hangkong Li ,
Kaimin Shih ,
Annie Ng  and
Charles Surya
Man Kwong Wong*
Affiliation:
The department of Physics, The University of Hong Kong, Pokfulam, Hong Kong.
Qi Dong
Affiliation:
The department of Physics, The University of Hong Kong, Pokfulam, Hong Kong.
Fangzhou Liu
Affiliation:
The department of Physics, The University of Hong Kong, Pokfulam, Hong Kong.
Aleksandra B. Djurišić
Affiliation:
The department of Physics, The University of Hong Kong, Pokfulam, Hong Kong.
Wai Kin Chan
Affiliation:
The department of Chemistry, The University of Hong Kong, Pokfulam, Hong Kong.
Hangkong Li
Affiliation:
The department of Civil Engineering, The University of Hong Kong, Pokfulam, Hong Kong.
Kaimin Shih
Affiliation:
The department of Civil Engineering, The University of Hong Kong, Pokfulam, Hong Kong.
Annie Ng
Affiliation:
The department of Electronic and Information Engineering, The Hong Kong Polytechnic University, Hung Hom, Hong Kong.
Charles Surya
Affiliation:
The department of Electronic and Information Engineering, The Hong Kong Polytechnic University, Hung Hom, Hong Kong.
*
*(Email: [email protected])
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Abstract

Perovskite based photovoltaics have recently emerged as the forerunner in the next generation photovoltaic technology because of the rapid increase of power conversion efficiency (PCE). However, it is well recognized that the exposure to moisture, heat and light causes the degradation of perovskite [1] (especially for methylammonium lead iodide (CH3NH3PbI3) which is the most commonly used perovskite material). It makes stability a main issue for the commercialization of perovskite based photovoltaics. Hence, an advanced encapsulation method is one of the keys to improve the stability. Here we present a comparison study between different encapsulation methods. Perovskite based photovoltaics devices were encapsulated using UV epoxy resin, with or without the addition of desiccant and the deposition of SiO2 layer. By minimizing the ingress of moisture and oxygen, devices with storage in ambient air under one sun continuous illumination could retain 94 % of the initial performance (PCE around 13%) after two days.

Keywords

barrier layerphotovoltaicSustainability
Type
Articles
Information
MRS Advances , Volume 1 , Issue 47: Electronics and Photonics , 2016 , pp. 3191 - 3198
Copyright
Copyright © Materials Research Society 2016 

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References

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