Diammonium Cations in the FASnI3 Perovskite Structure Lead to Lower Dark Currents and More Efficient Solar Cells

Weijun Ke, Constantinos C. Stoumpos, Ioannis Spanopoulos, Michelle Chen, Michael R Wasielewski, Mercouri G Kanatzidis

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Hybrid halide perovskite solar cells with mixed cations demonstrate superior optical and electrical properties especially for lead-based perovskite devices. Here, we report lead-free tin-based perovskite solar cells with diammonium cations, which can significantly improve the device performance. Formamidinium tin iodide (FASnI3) perovskite can incorporate propylenediammonium (PN) and trimethylenediammonium (TN) and retain its 3D structure while at the same time providing better film morphology and optoelectronic properties. As a result, solar cell devices using FASnI3 absorbers mixed with 10% PN and 10% TN achieve higher power conversion efficiencies of 5.85% and 5.53%, respectively, compared to 2.53% of the pristine FASnI3 solar cell. This difference in device performance can be mainly attributed to the reduced leakage current, lower trap-state density and recombination, as evidenced by our dark current-voltage, space-charge-limited-current, and impedance measurements. The results suggest that perovskite absorbers with mixed diammonium cations are beneficial in achieving high-performance perovskite solar cells.

Original languageEnglish
JournalACS Energy Letters
DOIs
Publication statusAccepted/In press - Apr 29 2018

Fingerprint

Dark currents
Perovskite
Cations
Solar cells
Tin
Positive ions
Lead
Iodides
Electric space charge
Leakage currents
Optoelectronic devices
Conversion efficiency
Electric properties
Optical properties
Electric potential
Perovskite solar cells
perovskite

ASJC Scopus subject areas

  • Chemistry (miscellaneous)
  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Materials Chemistry

Cite this

Diammonium Cations in the FASnI3 Perovskite Structure Lead to Lower Dark Currents and More Efficient Solar Cells. / Ke, Weijun; Stoumpos, Constantinos C.; Spanopoulos, Ioannis; Chen, Michelle; Wasielewski, Michael R; Kanatzidis, Mercouri G.

In: ACS Energy Letters, 29.04.2018.

Research output: Contribution to journalArticle

@article{00aeb198081d435d8a550b11cbd4d12a,
title = "Diammonium Cations in the FASnI3 Perovskite Structure Lead to Lower Dark Currents and More Efficient Solar Cells",
abstract = "Hybrid halide perovskite solar cells with mixed cations demonstrate superior optical and electrical properties especially for lead-based perovskite devices. Here, we report lead-free tin-based perovskite solar cells with diammonium cations, which can significantly improve the device performance. Formamidinium tin iodide (FASnI3) perovskite can incorporate propylenediammonium (PN) and trimethylenediammonium (TN) and retain its 3D structure while at the same time providing better film morphology and optoelectronic properties. As a result, solar cell devices using FASnI3 absorbers mixed with 10{\%} PN and 10{\%} TN achieve higher power conversion efficiencies of 5.85{\%} and 5.53{\%}, respectively, compared to 2.53{\%} of the pristine FASnI3 solar cell. This difference in device performance can be mainly attributed to the reduced leakage current, lower trap-state density and recombination, as evidenced by our dark current-voltage, space-charge-limited-current, and impedance measurements. The results suggest that perovskite absorbers with mixed diammonium cations are beneficial in achieving high-performance perovskite solar cells.",
author = "Weijun Ke and Stoumpos, {Constantinos C.} and Ioannis Spanopoulos and Michelle Chen and Wasielewski, {Michael R} and Kanatzidis, {Mercouri G}",
year = "2018",
month = "4",
day = "29",
doi = "10.1021/acsenergylett.8b00687",
language = "English",
journal = "ACS Energy Letters",
issn = "2380-8195",
publisher = "American Chemical Society",

}

TY - JOUR

T1 - Diammonium Cations in the FASnI3 Perovskite Structure Lead to Lower Dark Currents and More Efficient Solar Cells

AU - Ke, Weijun

AU - Stoumpos, Constantinos C.

AU - Spanopoulos, Ioannis

AU - Chen, Michelle

AU - Wasielewski, Michael R

AU - Kanatzidis, Mercouri G

PY - 2018/4/29

Y1 - 2018/4/29

N2 - Hybrid halide perovskite solar cells with mixed cations demonstrate superior optical and electrical properties especially for lead-based perovskite devices. Here, we report lead-free tin-based perovskite solar cells with diammonium cations, which can significantly improve the device performance. Formamidinium tin iodide (FASnI3) perovskite can incorporate propylenediammonium (PN) and trimethylenediammonium (TN) and retain its 3D structure while at the same time providing better film morphology and optoelectronic properties. As a result, solar cell devices using FASnI3 absorbers mixed with 10% PN and 10% TN achieve higher power conversion efficiencies of 5.85% and 5.53%, respectively, compared to 2.53% of the pristine FASnI3 solar cell. This difference in device performance can be mainly attributed to the reduced leakage current, lower trap-state density and recombination, as evidenced by our dark current-voltage, space-charge-limited-current, and impedance measurements. The results suggest that perovskite absorbers with mixed diammonium cations are beneficial in achieving high-performance perovskite solar cells.

AB - Hybrid halide perovskite solar cells with mixed cations demonstrate superior optical and electrical properties especially for lead-based perovskite devices. Here, we report lead-free tin-based perovskite solar cells with diammonium cations, which can significantly improve the device performance. Formamidinium tin iodide (FASnI3) perovskite can incorporate propylenediammonium (PN) and trimethylenediammonium (TN) and retain its 3D structure while at the same time providing better film morphology and optoelectronic properties. As a result, solar cell devices using FASnI3 absorbers mixed with 10% PN and 10% TN achieve higher power conversion efficiencies of 5.85% and 5.53%, respectively, compared to 2.53% of the pristine FASnI3 solar cell. This difference in device performance can be mainly attributed to the reduced leakage current, lower trap-state density and recombination, as evidenced by our dark current-voltage, space-charge-limited-current, and impedance measurements. The results suggest that perovskite absorbers with mixed diammonium cations are beneficial in achieving high-performance perovskite solar cells.

UR - http://www.scopus.com/inward/record.url?scp=85047616568&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85047616568&partnerID=8YFLogxK

U2 - 10.1021/acsenergylett.8b00687

DO - 10.1021/acsenergylett.8b00687

M3 - Article

AN - SCOPUS:85047616568

JO - ACS Energy Letters

JF - ACS Energy Letters

SN - 2380-8195

ER -