title: Encapsulation of Perovskite Solar Cells for High Humidity Conditions.
abstract: We examined different encapsulation strategies for perovskite solar cells by testing the device stability under continuous illumination, elevated temperature (85 °C) and ambient humidity of 65 %. The effects of the use of different epoxies, protective layers and the presence of desiccant were investigated. The best stability (retention of ∼80 % of initial efficiency on average after 48 h) was obtained for devices protected by a SiO2film and encapsulated with a UV-curable epoxy including a desiccant sheet. However, the stability of ZnO-based cells encapsulated by the same method was found to be inferior to that of TiO2-based cells. Finally, outdoor performance tests were performed for TiO2-based cells (30-90 % ambient humidity). All the stability tests were performed following the established international summit on organic photovoltaic stability (ISOS) protocols for organic solar cell testing (ISOS-L2 and ISOS-O1).
authors: Department of Physics, The University of Hong Kong, Pokfulam Road, Hong Kong, Hong Kong.
authors: Qi
authors: Q
authors: Dong
authors: Department of Physics, The University of Hong Kong, Pokfulam Road, Hong Kong, Hong Kong.
authors: Fangzhou
authors: F
authors: Liu
authors: Department of Physics, The University of Hong Kong, Pokfulam Road, Hong Kong, Hong Kong.
authors: Man Kwong
authors: MK
authors: Wong
authors: Department of Physics, The University of Hong Kong, Pokfulam Road, Hong Kong, Hong Kong.
authors: Ho Won
authors: HW
authors: Tam
authors: Department of Physics, The University of Hong Kong, Pokfulam Road, Hong Kong, Hong Kong. dalek@hku.hk.
authors: Aleksandra B
authors: AB
authors: Djurišić
authors: Department of Electronic and Information Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, Hong Kong.
authors: Annie
authors: A
authors: Ng
authors: Department of Electronic and Information Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, Hong Kong.
authors: Charles
authors: C
authors: Surya
authors: Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, Hong Kong.
authors: Wai Kin
authors: WK
authors: Chan
authors: Department of Physics, South University of Science & Technology of China, Tangchang Road, Nanshan District, Shenzhen, Guangdong, 518055, China.
authors: Alan Man Ching
authors: AM
authors: Ng
mesh_terms: D017610:Calcium Compounds / Q000737:chemistry*; D002214:Capsules; D004355:Drug Stability; D011211:Electric Power Supplies; D006813:Humidity; D010087:Oxides / Q000737:chemistry*; D012993:Solar Energy; D014025:Titanium / Q000737:chemistry*; D015034:Zinc Oxide / Q000737:chemistry
chemical_list: D017610:Calcium Compounds; D002214:Capsules; D010087:Oxides; C059910:perovskite; C009495:titanium dioxide; D014025:Titanium; D015034:Zinc Oxide
keywords: degradation; encapsulation; organometallic halide perovskite; solar cells; stability