Fabrication of Silicon Hierarchical Structures for Solar Cell Applications

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

Research output: Contribution to journalArticlepeer-review

47 Scopus citations


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 practical solar cells application, the short-circuit current density (JSC) 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 study open avenues for developing high-performance structure solar devices.
Original languageEnglish (US)
Pages (from-to)19395-19400
Number of pages6
JournalIEEE Access
StatePublished - Dec 7 2018

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledged KAUST grant number(s): OSR-2016-CRG5-3005
Acknowledgements: This work was financially supported by the King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR-2016-CRG5-3005), KAUST Sensor Initiative, KAUST Solar Center, and KAUST baseline funding.


Dive into the research topics of 'Fabrication of Silicon Hierarchical Structures for Solar Cell Applications'. Together they form a unique fingerprint.

Cite this