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Tunable open circuit voltage by engineering inorganic cesium lead bromide/iodide perovskite solar cells

Perovskite solar cells based on series of inorganic cesium lead bromide and iodide mixture, CsPbBr3-xI x , where x varies between 0, 0.1, 0.2, and 0.3 molar ratio were synthesized by two step-sequential deposition at ambient condition to design the variations of wide band gap light absorbers. A devi...

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Main Authors: Ng, Chi Huey, Ripolles, Teresa S., Hamada, Kengo, Teo, Siow Hwa, Lim, Hong Ngee, Bisquert, Juan, Hayase, Shuzi
Format: Article
Language:English
Published: Nature Research 2018
Online Access:http://psasir.upm.edu.my/id/eprint/74348/1/Tunable%20open%20circuit%20voltage%20by%20engineering%20inorganic%20cesium%20lead%20bromide.pdf
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spelling oai:psasir.upm.edu.my:74348 http://psasir.upm.edu.my/id/eprint/74348/ Tunable open circuit voltage by engineering inorganic cesium lead bromide/iodide perovskite solar cells Ng, Chi Huey Ripolles, Teresa S. Hamada, Kengo Teo, Siow Hwa Lim, Hong Ngee Bisquert, Juan Hayase, Shuzi Perovskite solar cells based on series of inorganic cesium lead bromide and iodide mixture, CsPbBr3-xI x , where x varies between 0, 0.1, 0.2, and 0.3 molar ratio were synthesized by two step-sequential deposition at ambient condition to design the variations of wide band gap light absorbers. A device with high overall photoconversion efficiency of 3.98 % was obtained when small amount of iodide (CsPbBr2.9I0.1) was used as the perovskite and spiro-OMeTAD as the hole transport material (HTM). We investigated the origin of variation in open circuit voltage, Voc which was shown to be mainly dependent on two factors, which are the band gap of the perovskite and the work function of the HTM. An increment in Voc was observed for the device with larger perovskite band gap, while keeping the electron and hole extraction contacts the same. Besides, the usage of bilayer P3HT/MoO3 with deeper HOMO level as HTM instead of spiro-OMeTAD, thus increased the Voc from 1.16 V to 1.3 V for CsPbBr3 solar cell, although the photocurrent is lowered due to charge extraction issues. The stability studies confirmed that the addition of small amount of iodide into the CsPbBr3 is necessarily to stabilize the cell performance over time. Nature Research 2018 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/74348/1/Tunable%20open%20circuit%20voltage%20by%20engineering%20inorganic%20cesium%20lead%20bromide.pdf Ng, Chi Huey and Ripolles, Teresa S. and Hamada, Kengo and Teo, Siow Hwa and Lim, Hong Ngee and Bisquert, Juan and Hayase, Shuzi (2018) Tunable open circuit voltage by engineering inorganic cesium lead bromide/iodide perovskite solar cells. Scientific Reports, 8. art. no. 2482. pp. 1-9. ISSN EISSN: 2045-2322 10.1038/s41598-018-20228-0
institution UPM IR
collection UPM IR
language English
description Perovskite solar cells based on series of inorganic cesium lead bromide and iodide mixture, CsPbBr3-xI x , where x varies between 0, 0.1, 0.2, and 0.3 molar ratio were synthesized by two step-sequential deposition at ambient condition to design the variations of wide band gap light absorbers. A device with high overall photoconversion efficiency of 3.98 % was obtained when small amount of iodide (CsPbBr2.9I0.1) was used as the perovskite and spiro-OMeTAD as the hole transport material (HTM). We investigated the origin of variation in open circuit voltage, Voc which was shown to be mainly dependent on two factors, which are the band gap of the perovskite and the work function of the HTM. An increment in Voc was observed for the device with larger perovskite band gap, while keeping the electron and hole extraction contacts the same. Besides, the usage of bilayer P3HT/MoO3 with deeper HOMO level as HTM instead of spiro-OMeTAD, thus increased the Voc from 1.16 V to 1.3 V for CsPbBr3 solar cell, although the photocurrent is lowered due to charge extraction issues. The stability studies confirmed that the addition of small amount of iodide into the CsPbBr3 is necessarily to stabilize the cell performance over time.
format Article
author Ng, Chi Huey
Ripolles, Teresa S.
Hamada, Kengo
Teo, Siow Hwa
Lim, Hong Ngee
Bisquert, Juan
Hayase, Shuzi
spellingShingle Ng, Chi Huey
Ripolles, Teresa S.
Hamada, Kengo
Teo, Siow Hwa
Lim, Hong Ngee
Bisquert, Juan
Hayase, Shuzi
Tunable open circuit voltage by engineering inorganic cesium lead bromide/iodide perovskite solar cells
author_facet Ng, Chi Huey
Ripolles, Teresa S.
Hamada, Kengo
Teo, Siow Hwa
Lim, Hong Ngee
Bisquert, Juan
Hayase, Shuzi
author_sort Ng, Chi Huey
title Tunable open circuit voltage by engineering inorganic cesium lead bromide/iodide perovskite solar cells
title_short Tunable open circuit voltage by engineering inorganic cesium lead bromide/iodide perovskite solar cells
title_full Tunable open circuit voltage by engineering inorganic cesium lead bromide/iodide perovskite solar cells
title_fullStr Tunable open circuit voltage by engineering inorganic cesium lead bromide/iodide perovskite solar cells
title_full_unstemmed Tunable open circuit voltage by engineering inorganic cesium lead bromide/iodide perovskite solar cells
title_sort tunable open circuit voltage by engineering inorganic cesium lead bromide/iodide perovskite solar cells
publisher Nature Research
publishDate 2018
url http://psasir.upm.edu.my/id/eprint/74348/1/Tunable%20open%20circuit%20voltage%20by%20engineering%20inorganic%20cesium%20lead%20bromide.pdf
_version_ 1819299165544382464
score 13.4562235

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