Improved light management in planar silicon and perovskite solar cells using PDMS scattering layer

Salman Manzoor, Zhengshan Yu, Asad Ali, Waqar Ali, Kevin A. Bush, Axel F. Palmstrom, Stacey F. Bent, Michael D. McGehee, Zachary Holman

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Several developing solar cell technologies-including perovskite cells, thin-film cells, epitaxially grown cells, and many tandem cells on silicon-have fabrication constraints that require a planar front surface. However, flat front surfaces result in large reflection losses and poor light trapping within the cell. We investigate scattering layers made from polydimethylsiloxane (PDMS) polymer carrying a random-pyramid texture to reduce such losses. The layers are first tested on a model system consisting of silicon heterojunction solar cells that have zero, one, or two surfaces textured with the same random pyramids (the other surfaces being planar) in order to elucidate the potential and limitations of employing a textured transparent layer instead of a textured absorber. PDMS layers result in short-circuit current density enhancements of 3.0mA/cm2 and 1.7mA/cm2 when applied to the front of a cell with flat front and rear surfaces, and a cell with a flat front surface and textured rear surface, respectively. Optical simulations reveal that the majority of the gain is due to a reduction in front-surface reflection and that the layers contribute only marginally to trapping weakly absorbed infrared light; nevertheless, a cell with a textured rear surface and a PDMS layer at its flat front surface can come to within 0.7mA/cm2 of the performance of a double-side-textured cell. Finally, a PDMS scattering layer is implemented in a planar perovskite solar cell, boosting its short-circuit current density by 1.9mA/cm2 and thus its efficiency by 10.6% relative.

Original languageEnglish (US)
JournalSolar Energy Materials and Solar Cells
DOIs
StateAccepted/In press - 2017

Fingerprint

Silicon solar cells
Polydimethylsiloxane
Scattering
Silicon
Short circuit currents
Solar cells
Current density
Perovskite solar cells
baysilon
Perovskite
Heterojunctions
Polymers
Textures
Infrared radiation
Fabrication
Thin films

Keywords

  • Antireflection coating
  • Light management
  • Light trapping
  • Perovskite
  • Ray tracing
  • Silicon heterojunction solar cell

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films

Cite this

Improved light management in planar silicon and perovskite solar cells using PDMS scattering layer. / Manzoor, Salman; Yu, Zhengshan; Ali, Asad; Ali, Waqar; Bush, Kevin A.; Palmstrom, Axel F.; Bent, Stacey F.; McGehee, Michael D.; Holman, Zachary.

In: Solar Energy Materials and Solar Cells, 2017.

Research output: Contribution to journalArticle

Manzoor, Salman ; Yu, Zhengshan ; Ali, Asad ; Ali, Waqar ; Bush, Kevin A. ; Palmstrom, Axel F. ; Bent, Stacey F. ; McGehee, Michael D. ; Holman, Zachary. / Improved light management in planar silicon and perovskite solar cells using PDMS scattering layer. In: Solar Energy Materials and Solar Cells. 2017.
@article{fd29a785b1604f24824e706deb11002b,
title = "Improved light management in planar silicon and perovskite solar cells using PDMS scattering layer",
abstract = "Several developing solar cell technologies-including perovskite cells, thin-film cells, epitaxially grown cells, and many tandem cells on silicon-have fabrication constraints that require a planar front surface. However, flat front surfaces result in large reflection losses and poor light trapping within the cell. We investigate scattering layers made from polydimethylsiloxane (PDMS) polymer carrying a random-pyramid texture to reduce such losses. The layers are first tested on a model system consisting of silicon heterojunction solar cells that have zero, one, or two surfaces textured with the same random pyramids (the other surfaces being planar) in order to elucidate the potential and limitations of employing a textured transparent layer instead of a textured absorber. PDMS layers result in short-circuit current density enhancements of 3.0mA/cm2 and 1.7mA/cm2 when applied to the front of a cell with flat front and rear surfaces, and a cell with a flat front surface and textured rear surface, respectively. Optical simulations reveal that the majority of the gain is due to a reduction in front-surface reflection and that the layers contribute only marginally to trapping weakly absorbed infrared light; nevertheless, a cell with a textured rear surface and a PDMS layer at its flat front surface can come to within 0.7mA/cm2 of the performance of a double-side-textured cell. Finally, a PDMS scattering layer is implemented in a planar perovskite solar cell, boosting its short-circuit current density by 1.9mA/cm2 and thus its efficiency by 10.6{\%} relative.",
keywords = "Antireflection coating, Light management, Light trapping, Perovskite, Ray tracing, Silicon heterojunction solar cell",
author = "Salman Manzoor and Zhengshan Yu and Asad Ali and Waqar Ali and Bush, {Kevin A.} and Palmstrom, {Axel F.} and Bent, {Stacey F.} and McGehee, {Michael D.} and Zachary Holman",
year = "2017",
doi = "10.1016/j.solmat.2017.06.020",
language = "English (US)",
journal = "Solar Energy Materials and Solar Cells",
issn = "0927-0248",
publisher = "Elsevier",

}

TY - JOUR

T1 - Improved light management in planar silicon and perovskite solar cells using PDMS scattering layer

AU - Manzoor, Salman

AU - Yu, Zhengshan

AU - Ali, Asad

AU - Ali, Waqar

AU - Bush, Kevin A.

AU - Palmstrom, Axel F.

AU - Bent, Stacey F.

AU - McGehee, Michael D.

AU - Holman, Zachary

PY - 2017

Y1 - 2017

N2 - Several developing solar cell technologies-including perovskite cells, thin-film cells, epitaxially grown cells, and many tandem cells on silicon-have fabrication constraints that require a planar front surface. However, flat front surfaces result in large reflection losses and poor light trapping within the cell. We investigate scattering layers made from polydimethylsiloxane (PDMS) polymer carrying a random-pyramid texture to reduce such losses. The layers are first tested on a model system consisting of silicon heterojunction solar cells that have zero, one, or two surfaces textured with the same random pyramids (the other surfaces being planar) in order to elucidate the potential and limitations of employing a textured transparent layer instead of a textured absorber. PDMS layers result in short-circuit current density enhancements of 3.0mA/cm2 and 1.7mA/cm2 when applied to the front of a cell with flat front and rear surfaces, and a cell with a flat front surface and textured rear surface, respectively. Optical simulations reveal that the majority of the gain is due to a reduction in front-surface reflection and that the layers contribute only marginally to trapping weakly absorbed infrared light; nevertheless, a cell with a textured rear surface and a PDMS layer at its flat front surface can come to within 0.7mA/cm2 of the performance of a double-side-textured cell. Finally, a PDMS scattering layer is implemented in a planar perovskite solar cell, boosting its short-circuit current density by 1.9mA/cm2 and thus its efficiency by 10.6% relative.

AB - Several developing solar cell technologies-including perovskite cells, thin-film cells, epitaxially grown cells, and many tandem cells on silicon-have fabrication constraints that require a planar front surface. However, flat front surfaces result in large reflection losses and poor light trapping within the cell. We investigate scattering layers made from polydimethylsiloxane (PDMS) polymer carrying a random-pyramid texture to reduce such losses. The layers are first tested on a model system consisting of silicon heterojunction solar cells that have zero, one, or two surfaces textured with the same random pyramids (the other surfaces being planar) in order to elucidate the potential and limitations of employing a textured transparent layer instead of a textured absorber. PDMS layers result in short-circuit current density enhancements of 3.0mA/cm2 and 1.7mA/cm2 when applied to the front of a cell with flat front and rear surfaces, and a cell with a flat front surface and textured rear surface, respectively. Optical simulations reveal that the majority of the gain is due to a reduction in front-surface reflection and that the layers contribute only marginally to trapping weakly absorbed infrared light; nevertheless, a cell with a textured rear surface and a PDMS layer at its flat front surface can come to within 0.7mA/cm2 of the performance of a double-side-textured cell. Finally, a PDMS scattering layer is implemented in a planar perovskite solar cell, boosting its short-circuit current density by 1.9mA/cm2 and thus its efficiency by 10.6% relative.

KW - Antireflection coating

KW - Light management

KW - Light trapping

KW - Perovskite

KW - Ray tracing

KW - Silicon heterojunction solar cell

UR - http://www.scopus.com/inward/record.url?scp=85021437244&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85021437244&partnerID=8YFLogxK

U2 - 10.1016/j.solmat.2017.06.020

DO - 10.1016/j.solmat.2017.06.020

M3 - Article

JO - Solar Energy Materials and Solar Cells

JF - Solar Energy Materials and Solar Cells

SN - 0927-0248

ER -