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Title: | Novel growth techniques for the deposition of high-quality perovskite thin films | Authors: | Ng, A Ren, Z Li, G Djurišić, AB Surya, C |
Issue Date: | 23-Feb-2018 | Source: | Proceedings of SPIE - The International Society for Optical Engineering, 23 Feb. 2018, v. 10533, Oxide-based Materials and Devices IX, 105331Y | Abstract: | We present investigations on the growth of high quality CH3NH3PbI3 (MAPI) thin films using both vapor and solution techniques. Recent work on perovskite film growth indicates critical dependencies of the film quality on the nucleation and crystallization steps requiring: i.) uniform distribution of nucleation sites; and ii.) optimal crystallization rate that facilitates the growth of a compact, continuous film with low density of pinholes. Our work shows that the hybrid chemical vapor deposition technique (HCVD) technique is well suited for the deposition of evenly distributed nucleation sites and the optimization of the crystallization rate of the film through detailed monitoring of the thermal profile of the growth process. Signficant reduction in the defect states is recorded by annealing the perovskite films in O2. The results are consistent with theoretical studies by Yin et al. 1 on O and Cl passivation of the shallow states at the grain boundary of MAPI. Their work provides the theoretical basis for our experimental observations on the passivation of shallow states by oxygen annealing. High quality films were achieved through detailed management of the carrier gas composition and the thermal profile of the nucleation and crystallization steps. | Keywords: | High efficiency perovskite solar cells Hybrid chemical vapor deposition Oxygen annealing |
Publisher: | SPIE-International Society for Optical Engineering | Journal: | Proceedings of SPIE : the International Society for Optical Engineering | ISBN: | 9781510615519 | ISSN: | 0277-786X | DOI: | 10.1117/12.2302468 | Description: | Oxide-Based Materials and Devices IX 2018, San Francisco, United States, 28 Jan - 1 Feb 2018 | Rights: | Copyright (2018) Society of Photo-Optical Instrumentation Engineers (SPIE). One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited. The following publication Annie Ng, Zhiwei Ren, Gang Li, Aleksandra B. Djurišić, and Charles Surya "Novel growth techniques for the deposition of high-quality perovskite thin films", Proc. SPIE 10533, Oxide-based Materials and Devices IX, 105331Y (23 February 2018) is available at https://dx.doi.org/10.1117/12.2302468. |
Appears in Collections: | Conference Paper |
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