Title:	Unveiling the Effect of Lead Halide on Thermal Stability of Perovskite Solar Cells
Author(s):	Y. Du, H. Cai, Y. Wu, H. Wen, Z. Li, J. Xu, L. Huang, J. Ni, J. Li, J. Zhang
Topic:	New Materials and Concepts for Solar Cells and Modules
Subtopic:	Fundamental Studies
Event:	32nd European Photovoltaic Solar Energy Conference and Exhibition
Session:	1BV.5.18
Pages:	148 - 151
ISBN:	3-936338-41-8
Paper DOI:	10.4229/EUPVSEC20162016-1BV.5.18
Price:	0,00 EUR
Document(s):	paper

Abstract/Summary:

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Sequential deposition methods for preparing CH3NH3PbI3 film are becoming increasingly popular when considering processing perovskite solar cells (PSCs) under relative relaxed conditions. Correspondingly, the problem concerning PbI2 residue receives special attention due to its deterioration to device performance reproducibility and long-term stability. In this work, we demonstrate an effective sequential thermal evaporation strategy in low vacuum (STELV) to fabricate PbI2-free CH3NH3PbI3 film with full coverage and good crystallization. Through a comparative study, it is observed that STELV has a stronger ability to control morphology and thickness of CH3NH3PbI3 film, alone with good uniformity. Moreover, we demonstrate that remaining PbI2 film should be responsible for the poor PSCs thermal stability.