Triple Cation Based Large Area Perovskite Cell Fabrication and its Performance in Light Harvesting Applications
Tsutomu Miyasaka a, Trilok Singh a
a Graduate School of Engineering, Toin University of Yokohama, Kurogane-cho 1614, Aoba-ku, Yokohama, 225-8503
Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics
Proceedings of International Conference Asia-Pacific Hybrid and Organic Photovoltaics (AP-HOPV17)
Yokohama-shi, Japan, 2017 February 2nd - 4th
Organizers: Tsutomu Miyasaka and Iván Mora-Seró
Oral, Trilok Singh, presentation 137
Publication date: 7th November 2016

Organic-inorganic hybrid perovskite materials have gained a lot of attention as light harvesters in thin film photovoltaic cells (PVCs) due to their excellent optoelectronic properties and its facile fabrication process. In last six years the power conversion efficiency has exceeds 22%, however there is still a huge possibility of improvement to reach near the theoretical limit (31%). Moreover, in order to optimize device performance and long term stability, better understanding of the general working principle of these optoelectronic devices with respect to various permutation and combination are needed. The other challenge is to grow uniform perovskite films on large area substrates of different compact layer to fabricate large area (10x10 mm2) perovskite cells. The crucial point to access the rapidly growing perovskite technology for commercialization is large area cell fabrication at relatively low temperature under controlled humidity (~ 30% RH) and understanding its optoelectronic properties.

This presentation will focus on the fabrication of various area (3x3, 5x5 and 10x10 mm2) cells with modified fabrication process on various metal oxide compact layers and their photovoltaic characteristics. Our recent finding showed that films fabrication parameters (temperature, humidity, dripping, substrates preconditioning), uniformity, grain growth and post annealing conditions vastly influenced the final device performance. Our best device showed efficiency over 20% for cell active area 5x5 mm2 with short circuit current density (Jsc) 23.4 mA/cm2, open circuit voltage (Voc) 1.11 and fill factor (FF)of 78. Moreover, this talk will also highlight large area cell (active area 10x10 mm2) fabrication and optimization.



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