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    Fabrication of Silicon Hierarchical Structures for Solar Cell Applications

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    Type
    Article
    Authors
    Wang, Hsin-Ping
    Dharmaraj, Periyanagounder
    Li, An-Cheng
    He, Jr-Hau cc
    KAUST Department
    Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
    Electrical Engineering Program
    KAUST Solar Center (KSC)
    Nano Energy Lab
    Physical Science and Engineering (PSE) Division
    KAUST Grant Number
    OSR-2016-CRG5-3005
    Date
    2018-12-07
    Online Publication Date
    2018-12-07
    Print Publication Date
    2019
    Permanent link to this record
    http://hdl.handle.net/10754/630268
    
    Metadata
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    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 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.
    Citation
    Wang H-P, Dharmaraj P, Li A-C, He J-H (2018) Fabrication of Silicon Hierarchical Structures for Solar Cell Applications. IEEE Access: 1–1. Available: http://dx.doi.org/10.1109/access.2018.2885169.
    Sponsors
    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.
    Publisher
    Institute of Electrical and Electronics Engineers (IEEE)
    Journal
    IEEE Access
    DOI
    10.1109/access.2018.2885169
    Additional Links
    https://ieeexplore.ieee.org/document/8565843
    ae974a485f413a2113503eed53cd6c53
    10.1109/access.2018.2885169
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Electrical and Computer Engineering Program; KAUST Solar Center (KSC); Computer, Electrical and Mathematical Science and Engineering (CEMSE) Division

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