Enhanced Performance of Germanium Halide Perovskite Solar Cells through Compositional Engineering

Indira Kopacic; Bastian Friesenbichler; Sebastian Franz Höfler; Birgit Kunert; Harald Plank; Thomas Rath; Gregor Trimmel

doi:10.1021/acsaem.8b00007

Enhanced Performance of Germanium Halide Perovskite Solar Cells through Compositional Engineering

Indira Kopacic, Bastian Friesenbichler, Sebastian Franz Höfler, Birgit Kunert, Harald Plank, Thomas Rath^*, Gregor Trimmel

^*Corresponding author for this work

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

Abstract

Germanium halide perovskites are an attractive alternative to lead perovskites because of their well-suited optical properties for photovoltaic applications. However, the power conversion efficiencies of solar cells based on germanium perovskites remained below 0.2% so far, and also, the device stability is an issue. Herein, we show that modifying the chemical composition of the germanium perovskite, i.e., introducing bromide ions into the methylammonium germanium iodide perovskite, leads to a significant improvement of the solar cell performance along with a slight enhancement of the stability of the germanium perovskite. With substitution of 10% of the iodide with bromide, power conversion efficiencies up to 0.57% were obtained in MAGeI2.7Br0.3 based solar cells with a planar p–i–n architecture using PEDOT:PSS as hole and PC70BM as electron transport layer.

Original language	English
Pages (from-to)	343-347
Number of pages	5
Journal	ACS Applied Energy Materials
Volume	1
Issue number	2
DOIs	https://doi.org/10.1021/acsaem.8b00007
Publication status	Published - 2018

Fields of Expertise

Advanced Materials Science

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1021/acsaem.8b00007

Cite this

@article{f99eb9c04069482cb78fb6a3b4c64c01,

title = "Enhanced Performance of Germanium Halide Perovskite Solar Cells through Compositional Engineering",

abstract = "Germanium halide perovskites are an attractive alternative to lead perovskites because of their well-suited optical properties for photovoltaic applications. However, the power conversion efficiencies of solar cells based on germanium perovskites remained below 0.2% so far, and also, the device stability is an issue. Herein, we show that modifying the chemical composition of the germanium perovskite, i.e., introducing bromide ions into the methylammonium germanium iodide perovskite, leads to a significant improvement of the solar cell performance along with a slight enhancement of the stability of the germanium perovskite. With substitution of 10% of the iodide with bromide, power conversion efficiencies up to 0.57% were obtained in MAGeI2.7Br0.3 based solar cells with a planar p–i–n architecture using PEDOT:PSS as hole and PC70BM as electron transport layer.",

author = "Indira Kopacic and Bastian Friesenbichler and H{\"o}fler, {Sebastian Franz} and Birgit Kunert and Harald Plank and Thomas Rath and Gregor Trimmel",

year = "2018",

doi = "10.1021/acsaem.8b00007",

language = "English",

volume = "1",

pages = "343--347",

journal = "ACS Applied Energy Materials",

issn = "2574-0962",

publisher = "American Chemical Society",

number = "2",

}

TY - JOUR

T1 - Enhanced Performance of Germanium Halide Perovskite Solar Cells through Compositional Engineering

AU - Kopacic, Indira

AU - Friesenbichler, Bastian

AU - Höfler, Sebastian Franz

AU - Kunert, Birgit

AU - Plank, Harald

AU - Rath, Thomas

AU - Trimmel, Gregor

PY - 2018

Y1 - 2018

N2 - Germanium halide perovskites are an attractive alternative to lead perovskites because of their well-suited optical properties for photovoltaic applications. However, the power conversion efficiencies of solar cells based on germanium perovskites remained below 0.2% so far, and also, the device stability is an issue. Herein, we show that modifying the chemical composition of the germanium perovskite, i.e., introducing bromide ions into the methylammonium germanium iodide perovskite, leads to a significant improvement of the solar cell performance along with a slight enhancement of the stability of the germanium perovskite. With substitution of 10% of the iodide with bromide, power conversion efficiencies up to 0.57% were obtained in MAGeI2.7Br0.3 based solar cells with a planar p–i–n architecture using PEDOT:PSS as hole and PC70BM as electron transport layer.

AB - Germanium halide perovskites are an attractive alternative to lead perovskites because of their well-suited optical properties for photovoltaic applications. However, the power conversion efficiencies of solar cells based on germanium perovskites remained below 0.2% so far, and also, the device stability is an issue. Herein, we show that modifying the chemical composition of the germanium perovskite, i.e., introducing bromide ions into the methylammonium germanium iodide perovskite, leads to a significant improvement of the solar cell performance along with a slight enhancement of the stability of the germanium perovskite. With substitution of 10% of the iodide with bromide, power conversion efficiencies up to 0.57% were obtained in MAGeI2.7Br0.3 based solar cells with a planar p–i–n architecture using PEDOT:PSS as hole and PC70BM as electron transport layer.

U2 - 10.1021/acsaem.8b00007

DO - 10.1021/acsaem.8b00007

M3 - Article

SN - 2574-0962

VL - 1

SP - 343

EP - 347

JO - ACS Applied Energy Materials

JF - ACS Applied Energy Materials

IS - 2

ER -

Enhanced Performance of Germanium Halide Perovskite Solar Cells through Compositional Engineering

Abstract

Fields of Expertise

UN SDGs

Access to Document

Fingerprint

Cite this