Solar cell with extremely thin absorber on highly structured substrate

K. Ernst, Abdelhak Belaidi, R. Könenkamp

Research output: Contribution to journalArticle

161 Citations (Scopus)

Abstract

We report the optical, structural and photovoltaic properties of an extremely-thin-absorber (eta) solar cell on highly porous TiO2 substrates. Nano-crystalline absorber layers with a local thickness of only 150 nm have been prepared. This small absorber thickness allows good carrier collection even for absorber material with poor transport properties. The morphology of the highly structured TiO2 substrate produces strong internal light scattering, resulting in an enhancement of the optical path length by a factor 5. With 150 nm thick CdTe absorber layers, the eta solar cells produce an open-circuit voltage of 0.67 V and a short-circuit current of 8.9 mA cm-2 for 100 mW cm-2 illumination. Alloying the CdTe with Hg improves the short-circuit current to 15 mA cm-2.

Original languageEnglish
Pages (from-to)475-479
Number of pages5
JournalSemiconductor Science and Technology
Volume18
Issue number6
DOIs
Publication statusPublished - Jun 2003
Externally publishedYes

Fingerprint

Short circuit currents
absorbers
Solar cells
solar cells
Open circuit voltage
Substrates
Alloying
Light scattering
Transport properties
short circuit currents
Lighting
Crystalline materials
absorbers (materials)
open circuit voltage
optical paths
alloying
light scattering
transport properties
illumination
optical properties

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Solar cell with extremely thin absorber on highly structured substrate. / Ernst, K.; Belaidi, Abdelhak; Könenkamp, R.

In: Semiconductor Science and Technology, Vol. 18, No. 6, 06.2003, p. 475-479.

Research output: Contribution to journalArticle

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