Perovskite Precursor Solution Tuned with Polymer Addition for Effective Formation of the Photovoltaic Layer
Mayu Yamaguchi a, Takeo Suga a, Kenichi Oyaizu a, Hiroshi Segawa b, Hiroyuki Nishide a
a Waseda University, Department of Applied Chemistry, Japan, 169-8555, Japón, Shinjuku City, Japan
b Research Center for Advanced Science and Technology (RCAST), The University of Tokyo, Japan, Japan
Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics
Proceedings of International Conference on Perovskite and Organic Photovoltaics and Optoelectronics (IPEROP19)
Kyōto-shi, Japan, 2019 January 27th - 29th
Organizers: Hideo Ohkita, Atsushi Wakamiya and Mohammad Nazeeruddin
Poster, Mayu Yamaguchi, 112
Publication date: 23rd October 2018

The perovskite precursor (lead Iodide, methylamine hydroiodide, and methylamine hydrochloride) solution has been reported by using low boiling point solvents, such as acetonitrile [1]. In this presentation, the precursor solution was tuned by adding polymers, such as poly(9-vinylcarbazole) (PVK), polystyrene (PS), and poly(methyl methacrylate) (PMMA), for getting appropriate viscosity for bar-coating. Molecular weight of the used polymers was 2,000-20,000, and different concentration of the solution was tested 1-10 mg/ml. The viscous precursor solution was important for getting 400-500 nm thickness which was showed from the cross-sectional SEM image of perovskite layer. The trace amount coexistence of polymer worked as a nuclei and was scaffolding for perovskite crystal growth to yield high quality perovskite crystals. The perovskite solar cells with 5 × 5 cm was fabricated with one step bar-coating, which yielded high short-circuit current density and power conversion efficiency of >14%. Durability of the cells fabricated with the perovskite precursor containing the polymer was improved.

This work was partially supported by NEDO project, Japan.

We use our own and third party cookies for analysing and measuring usage of our website to improve our services. If you continue browsing, we consider accepting its use. You can check our Cookies Policy in which you will also find how to configure your web browser for the use of cookies. More info