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      The fabrication of formamidinium lead iodide perovskite thin films via organic cation exchange

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          Abstract

          With NH 4PbI 3 as the starting material, an organic cation exchange concept is employed to fabricate high-quality α-FAPbI 3 perovskite thin films.

          Abstract

          High-quality formamidinium lead iodide (FAPbI 3) perovskite thin films are fabricated via organic cation exchange. With ammonia lead iodide (NH 4PbI 3) as the starting material, the NH 4 + in NH 4PbI 3 could be gradually substituted by FA + in formamidine acetate (FA-Ac) and simultaneously transformed to the pure phase α-FAPbI 3 at elevated temperature.

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          A fast deposition-crystallization procedure for highly efficient lead iodide perovskite thin-film solar cells.

          Manda Xiao, Fuzhi Huang, Wenchao Huang … (2014)
          Thin-film photovoltaics based on alkylammonium lead iodide perovskite light absorbers have recently emerged as a promising low-cost solar energy harvesting technology. To date, the perovskite layer in these efficient solar cells has generally been fabricated by either vapor deposition or a two-step sequential deposition process. We report that flat, uniform thin films of this material can be deposited by a one-step, solvent-induced, fast crystallization method involving spin-coating of a DMF solution of CH3NH3PbI3 followed immediately by exposure to chlorobenzene to induce crystallization. Analysis of the devices and films revealed that the perovskite films consist of large crystalline grains with sizes up to microns. Planar heterojunction solar cells constructed with these solution-processed thin films yielded an average power conversion efficiency of 13.9±0.7% and a steady state efficiency of 13% under standard AM 1.5 conditions.
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            Organohalide lead perovskites for photovoltaic applications

            Peng Gao, Michael Grätzel, Mohammad K Nazeeruddin (2014)
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              Toward large scale roll-to-roll production of fully printed perovskite solar cells.

              Kyeongil Hwang, Yen-Sook Jung, Youn-Jung Heo … (2015)
              Fully printed perovskite solar cells are demonstrated with slot-die coating, a scalable printing method. A sequential slot-die coating process is developed to produce efficient perovskite solar cells and to be used in a large-scale roll-to-roll printing process. All layers excluding the electrodes are printed and devices demonstrate up to 11.96% power conversion efficiency. It is also demonstrated that the new process can be used in roll-to-roll production.
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                Author and article information

                Journal
                Journal ID (publisher-id): CHCOFS
                Title: Chemical Communications
                Abbreviated Title: Chem. Commun.
                Publisher: Royal Society of Chemistry (RSC)
                ISSN (Print): 1359-7345
                ISSN (Electronic): 1364-548X
                Publication date Created: 2016
                Publication date (Electronic): 2016
                Volume: 52
                Issue: 19
                Pages: 3828-3831
                Affiliations
                [1 ]Qingdao Institute of Bioenergy and Bioprocess Technology
                [2 ]Chinese Academy of Sciences
                [3 ]Qingdao 266101
                [4 ]People's Republic of China
                Article
                DOI: 10.1039/C5CC09873D
                SO-VID: 23c46f06-4888-4095-83b9-41a71b104eaa
                Copyright © © 2016
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