Surface texturing of crystalline silicon solar cell using silicon nanowires

Kyeom Seon Do, Min Gu Kang, Je Jun Park, Gi Hwan Kang, Jae Min Myoung, Hee Eun Song

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Surface texturing with silicon nanowires on a pyramidal structure was explored by simple metal-assisted chemical etching to improve the electrical performance of a silicon solar cell. The length of nanowires was controlled by changing the etching time in a H2O2/HF solution after Ag ion adsorption. The weighted reflectance from 300 to 1200nm was reduced to as low as 4.6% with a 200-nm-long nanowire formed by 30 s etching, while the pyramid surface had a 12.3% reflectance before antireflection (AR) coating deposition. However, the surface textured with 200-nm-long silicon nanowires had a similar reflectance, even after AR coating, and a decreased conversion efficiency in the completed solar cell. Since the silicon wafer with 200-nm-long nanowires had a deep and narrow structure, the AR layer could not be deposited uniformly, which resulted in a low passivation quality and an antireflection effect. This means that the surface structure, even with low reflectance, cannot be appropriate in the cell fabrication process because it is not capable of improving the solar cell performance characteristics. On the other hand, the 30-nm-long nanowire-textured silicon solar cell formed by 2 s etching had a decreased reflectance and improved electrical properties. As a result, the 30-nmlong silicon nanowire-textured solar cell exhibited improved performance characteristics, Jsc 1/4 0:3 mA/cm2, Voc 1/4 2 mV, and 1/4 0:2%, compared with only a pyramidal textured surface. This suggests that a respectable quality in the passivation and antireflection layers, as well as reflectance reduction, in nanoscale-textured silicon solar cells is required for silicon solar cell performance.

Original languageEnglish
Article number092301
JournalJapanese journal of applied physics
Volume52
Issue number9
DOIs
Publication statusPublished - 2013 Sep 1

Fingerprint

Texturing
Silicon solar cells
Nanowires
nanowires
solar cells
Crystalline materials
Silicon
reflectance
silicon
Etching
etching
Antireflection coatings
Solar cells
antireflection coatings
Passivation
passivity
pyramids
Silicon wafers
Surface structure
Conversion efficiency

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

Do, Kyeom Seon ; Kang, Min Gu ; Park, Je Jun ; Kang, Gi Hwan ; Myoung, Jae Min ; Song, Hee Eun. / Surface texturing of crystalline silicon solar cell using silicon nanowires. In: Japanese journal of applied physics. 2013 ; Vol. 52, No. 9.
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abstract = "Surface texturing with silicon nanowires on a pyramidal structure was explored by simple metal-assisted chemical etching to improve the electrical performance of a silicon solar cell. The length of nanowires was controlled by changing the etching time in a H2O2/HF solution after Ag ion adsorption. The weighted reflectance from 300 to 1200nm was reduced to as low as 4.6{\%} with a 200-nm-long nanowire formed by 30 s etching, while the pyramid surface had a 12.3{\%} reflectance before antireflection (AR) coating deposition. However, the surface textured with 200-nm-long silicon nanowires had a similar reflectance, even after AR coating, and a decreased conversion efficiency in the completed solar cell. Since the silicon wafer with 200-nm-long nanowires had a deep and narrow structure, the AR layer could not be deposited uniformly, which resulted in a low passivation quality and an antireflection effect. This means that the surface structure, even with low reflectance, cannot be appropriate in the cell fabrication process because it is not capable of improving the solar cell performance characteristics. On the other hand, the 30-nm-long nanowire-textured silicon solar cell formed by 2 s etching had a decreased reflectance and improved electrical properties. As a result, the 30-nmlong silicon nanowire-textured solar cell exhibited improved performance characteristics, Jsc 1/4 0:3 mA/cm2, Voc 1/4 2 mV, and 1/4 0:2{\%}, compared with only a pyramidal textured surface. This suggests that a respectable quality in the passivation and antireflection layers, as well as reflectance reduction, in nanoscale-textured silicon solar cells is required for silicon solar cell performance.",
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Surface texturing of crystalline silicon solar cell using silicon nanowires. / Do, Kyeom Seon; Kang, Min Gu; Park, Je Jun; Kang, Gi Hwan; Myoung, Jae Min; Song, Hee Eun.

In: Japanese journal of applied physics, Vol. 52, No. 9, 092301, 01.09.2013.

Research output: Contribution to journalArticle

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