Fabrication of Silicon Hierarchical Structures for Solar Cell Applications

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Hsin-Ping Wang
  • Dharmaraj Periyanagounder
  • An-Cheng Li
  • Jr-Hau He

Detail(s)

Original languageEnglish
Article number8565843
Pages (from-to)19395-19400
Journal / PublicationIEEE Access
Volume7
Online published6 Dec 2018
Publication statusPublished - 2019
Externally publishedYes

Abstract

Hierarchical silicon structures consisting of micropyramids and nanowire arrays are fabricated by two-step chemical etching processes aimed at achieving cost and time effectiveness constraints without using any expensive vacuum system or complicated lithography process. The hierarchical structures can suppress the average reflectance to as low as 4.3% from 300 to 1100 nm without causing poor minority carrier lifetimes, exhibiting excellent broadband light-harvesting abilities with minimal recombination losses, which is the key point to design high-performance nanostructured solar cells. By utilizing hierarchical structures in the practical solar cells application, the short-circuit current density ( SC ) shows a significant enhancement from 21.5 to 28.7 mA/cm2 , and the conversion efficiency is enhanced by a factor of 35%. Such a significant enhancement is attributed not only to the superior light harvesting achieved by hierarchical structures but also to the benefit of small electrical losses in the solar cells. Thus, the concept and technique presented in this paper open avenues for developing high-performance structure solar devices.

Research Area(s)

  • Hierarchical structures, light-harvesting, micropyramids, power conversion efficiency, surface recombination

Citation Format(s)

Fabrication of Silicon Hierarchical Structures for Solar Cell Applications. / Wang, Hsin-Ping; Periyanagounder, Dharmaraj; Li, An-Cheng; He, Jr-Hau.

In: IEEE Access, Vol. 7, 8565843, 2019, p. 19395-19400.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review