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Title:
 
Controlled Laser-Induced PBI2 Formation for Optimized P2 and P3 Patterning of Perovskite Mini-Modules
 
Author(s):
 
C. Schultz, M. Fenske, J. Dagar, C. Junghans, A. Zeiser, A. Bartelt, R. Schlatmann, E. Unger, B. Stegemann
 
Keywords:
 
Photoluminescence, Laser, Patterning, Perovskite, PbI2
 
Topic:
 
Perovskites and Other Non-Silicon Materials, MJs and Tandems
Subtopic: Perovskites
Event: 37th European Photovoltaic Solar Energy Conference and Exhibition
Session: 3BO.9.6
 
Pages:
 
601 - 605
ISBN: 3-936338-73-6
Paper DOI: 10.4229/EUPVSEC20202020-3BO.9.6
 
Price:
 
 
0,00 EUR
 
Document(s): paper
 

Abstract/Summary:


Monolithic series interconnection of perovskite solar cells is necessary for scaling up the currently still small cell sizes. This requires patterning of the individual solar cell layers, preferably by laser. The underlying ablation mechanisms are investigated in this paper to find optimal laser parameters and process windows. It is shown that the use of ns laser pulses produces a larger amount of PbI2 in the processed area than ps laser pulses. The resulting PbI2 was found to be detrimental to the electrical behavior during P2 patterning of the absorber layer, but advantageous for P3 patterning of the back contact. By choosing the laser pulse length, the amount of PbI2 can be controlled and thus the electrical losses can be minimized. In this way, mini-module efficiencies of more than 19% were achieved.