EU PVSEC Programme Online
EU PVSEC 2021, 6 - 10 September 2021
Presentation: 6DO.7.5 Customizable Color- and Shape-Design of Inkjet-Printed Perovskite Solar Cells for Building-Integrated Photovoltaics
Type: Oral
Date: Thursday, 9th September 2021
10:30 - 12:00
Author(s): H. Eggers, F. Schackmar, C. Erban, S. Gharibzadeh, T. Abzieher, D.B. Ritzer, B.S. Richards, U.W. Paetzold
Presenter / Speaker: H. Eggers, Karlsruhe Institute of Technology, Karlsruhe, Germany
Event: Conference Conference
Session: 6DO.7 BIPV Development and Customisation: Approaches and Experimental Results
Topic: 6. 1 PV on/in Buildings
Summary / Abstract: The market for building-integrated photovoltaics is steadily growing. Next to the costs, the appearance is thought to be one of the major decision criteria for or against the installation of solar cells into a building. The emerging photovoltaic technology based on perovskite absorbers attracts increasing attention in research and industry for building-integrated photovoltaics. Not only does it show high power conversion efficiencies as stand-alone- or tandem-devices in conjunction with other solar cell technologies, but also offers as a solution-processable thin-film-technology new possibilities to design the appearance of photovoltaic devices. In this work, we present perovskite solar cells that are easily customizable in color and shape: The fabrication of the perovskite solar cells is based on inkjet printing technology. By engineering of substrate surface and ink properties we are able to demonstrate that this approach allows us to change the shape of the perovskite solar cells almost arbitrarily. In addition, we utilize a colorization method based on inkjet-printed dyes that allows for hetero-chromic design patterns. The achieved color impression is freely adjustable in color, brightness and almost indifferent to the incident viewing angle. Champion devices yield over 65% relative and 11% absolute power conversion efficiency for bright magenta and yellow colorization. Solar cells with patterns similar to white marble that answer for high aesthetic demands entail up to 14% power conversion efficiency. Here we combine these two methods for fabrication and colorization and present operational prototypes of colorful free-form perovskite solar cells. We are confident that such devices will increase the acceptance to integrate solar cells into buildings’ walls or roofs and the presented results are therefore of interest for future application in the emerging field of building-integrated photovoltaics.