Additive Engineering with Triple Cations and Bifunctional Sulfamic Acid for Tin Perovskite Solar Cells Attaining a PCE Value of 12.5% without Hysteresis

Chun Hsiao Kuan; Juin Min Chih; Yu Cheng Chen; Bo Hong Liu; Chia Hsin Wang; Cheng Hung Hou; Jing Jong Shyue; Eric Wei Guang Diau

doi:10.1021/acsenergylett.2c02148

Additive Engineering with Triple Cations and Bifunctional Sulfamic Acid for Tin Perovskite Solar Cells Attaining a PCE Value of 12.5% without Hysteresis

Chun Hsiao Kuan, Juin Min Chih, Yu Cheng Chen, Bo Hong Liu, Chia Hsin Wang, Cheng Hung Hou, Jing Jong Shyue, Eric Wei Guang Diau^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

42 Scopus citations

Abstract

Imidazolium (IM) and cesium (Cs) were treated as A-site cationic additives for a triiodide tin perovskite solar cell (FASnI₃; FA, formamidinium) with sulfamic acid (SA) as a bifunctional additive in varied proportions. IM has a tight aromatic structure that is feasible to passivate the crystal defects and help in perovskite crystallization. Cs can stabilize the crystal structure and decrease trap state densities. TOF-SIMS measurements show the passivation effect of both IM and SA occurring on the surface of the film. The bifunctional SA additive can occupy the iodine vacancies in tin perovskites to passivate the uncoordinated Sn atoms and to passivate the surface defects effectively. Furthermore, SA has the effect of reducing Sn⁴⁺back to Sn²⁺via its ammonia/acid form converted from its zwitterionic form upon irradiation, as observed from in situ XPS measurements. The hybrid device was optimized to attain a PCE value of 12.5% for the perovskite structure Cs_0.02IM_0.1FA_0.88SnI₃+1% SA with superior, long-lasting stability.

Original language	English
Pages (from-to)	4436-4442
Number of pages	7
Journal	ACS Energy Letters
Volume	7
Issue number	12
DOIs	https://doi.org/10.1021/acsenergylett.2c02148
State	Published - 9 Dec 2022

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title = "Additive Engineering with Triple Cations and Bifunctional Sulfamic Acid for Tin Perovskite Solar Cells Attaining a PCE Value of 12.5% without Hysteresis",

abstract = "Imidazolium (IM) and cesium (Cs) were treated as A-site cationic additives for a triiodide tin perovskite solar cell (FASnI3; FA, formamidinium) with sulfamic acid (SA) as a bifunctional additive in varied proportions. IM has a tight aromatic structure that is feasible to passivate the crystal defects and help in perovskite crystallization. Cs can stabilize the crystal structure and decrease trap state densities. TOF-SIMS measurements show the passivation effect of both IM and SA occurring on the surface of the film. The bifunctional SA additive can occupy the iodine vacancies in tin perovskites to passivate the uncoordinated Sn atoms and to passivate the surface defects effectively. Furthermore, SA has the effect of reducing Sn4+back to Sn2+via its ammonia/acid form converted from its zwitterionic form upon irradiation, as observed from in situ XPS measurements. The hybrid device was optimized to attain a PCE value of 12.5% for the perovskite structure Cs0.02IM0.1FA0.88SnI3+1% SA with superior, long-lasting stability.",

author = "Kuan, {Chun Hsiao} and Chih, {Juin Min} and Chen, {Yu Cheng} and Liu, {Bo Hong} and Wang, {Chia Hsin} and Hou, {Cheng Hung} and Shyue, {Jing Jong} and Diau, {Eric Wei Guang}",

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doi = "10.1021/acsenergylett.2c02148",

language = "English",

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journal = "ACS Energy Letters",

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T1 - Additive Engineering with Triple Cations and Bifunctional Sulfamic Acid for Tin Perovskite Solar Cells Attaining a PCE Value of 12.5% without Hysteresis

AU - Kuan, Chun Hsiao

AU - Chih, Juin Min

AU - Chen, Yu Cheng

AU - Liu, Bo Hong

AU - Wang, Chia Hsin

AU - Hou, Cheng Hung

AU - Shyue, Jing Jong

AU - Diau, Eric Wei Guang

PY - 2022/12/9

Y1 - 2022/12/9

N2 - Imidazolium (IM) and cesium (Cs) were treated as A-site cationic additives for a triiodide tin perovskite solar cell (FASnI3; FA, formamidinium) with sulfamic acid (SA) as a bifunctional additive in varied proportions. IM has a tight aromatic structure that is feasible to passivate the crystal defects and help in perovskite crystallization. Cs can stabilize the crystal structure and decrease trap state densities. TOF-SIMS measurements show the passivation effect of both IM and SA occurring on the surface of the film. The bifunctional SA additive can occupy the iodine vacancies in tin perovskites to passivate the uncoordinated Sn atoms and to passivate the surface defects effectively. Furthermore, SA has the effect of reducing Sn4+back to Sn2+via its ammonia/acid form converted from its zwitterionic form upon irradiation, as observed from in situ XPS measurements. The hybrid device was optimized to attain a PCE value of 12.5% for the perovskite structure Cs0.02IM0.1FA0.88SnI3+1% SA with superior, long-lasting stability.

AB - Imidazolium (IM) and cesium (Cs) were treated as A-site cationic additives for a triiodide tin perovskite solar cell (FASnI3; FA, formamidinium) with sulfamic acid (SA) as a bifunctional additive in varied proportions. IM has a tight aromatic structure that is feasible to passivate the crystal defects and help in perovskite crystallization. Cs can stabilize the crystal structure and decrease trap state densities. TOF-SIMS measurements show the passivation effect of both IM and SA occurring on the surface of the film. The bifunctional SA additive can occupy the iodine vacancies in tin perovskites to passivate the uncoordinated Sn atoms and to passivate the surface defects effectively. Furthermore, SA has the effect of reducing Sn4+back to Sn2+via its ammonia/acid form converted from its zwitterionic form upon irradiation, as observed from in situ XPS measurements. The hybrid device was optimized to attain a PCE value of 12.5% for the perovskite structure Cs0.02IM0.1FA0.88SnI3+1% SA with superior, long-lasting stability.

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DO - 10.1021/acsenergylett.2c02148

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ER -

Additive Engineering with Triple Cations and Bifunctional Sulfamic Acid for Tin Perovskite Solar Cells Attaining a PCE Value of 12.5% without Hysteresis

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