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Manipulation of stored charge density and polarity in anodic aluminium oxide for silicon solar cell passivation

Lu, Zhong; Ouyang, Z; Grant, Nicholas; Wan, Yimao; Yan, Di; Lennon, Alison

Description

This paper introduces a method to manipulate stored charge density and polarity in anodic aluminium oxide (AAO) for silicon solar cell passivation. The method involves the use of a pulse current source to anodise aluminium layers instead of the typically used constant current/voltage source, with the test structures experiencing positive and negative cycles periodically. By tuning the positive cycle percentage, it is demonstrated that the effective stored charge can be manipulated in a range...[Show more]

dc.contributor.authorLu, Zhong
dc.contributor.authorOuyang, Z
dc.contributor.authorGrant, Nicholas
dc.contributor.authorWan, Yimao
dc.contributor.authorYan, Di
dc.contributor.authorLennon, Alison
dc.date.accessioned2016-02-24T22:41:32Z
dc.identifier.issn1876-6102
dc.identifier.urihttp://hdl.handle.net/1885/98723
dc.description.abstractThis paper introduces a method to manipulate stored charge density and polarity in anodic aluminium oxide (AAO) for silicon solar cell passivation. The method involves the use of a pulse current source to anodise aluminium layers instead of the typically used constant current/voltage source, with the test structures experiencing positive and negative cycles periodically. By tuning the positive cycle percentage, it is demonstrated that the effective stored charge can be manipulated in a range from -5.2×1011 to 2.5×1012 q/cm2 when the AAO is formed over a thin silicon dioxide layer. Photoconductance decay measurements on symmetrical n-type test structures with ∼ 150 Ω/□ boron-diffused surfaces were used to estimate the recombination current density associated with the diffused surface (Jop+), which was then correlated to the stored charge. As the effective stored charge changed from positive towards negative values, the Jop+ was reduced from 210 fA/cm2 to 100 fA/cm2. The stored charge in various test structures was monitored constantly to study the stability. It was found that the positive stored charge deteriorated with time while the negative charge was relatively stable.
dc.publisherElsevier
dc.sourceEnergy Procedia
dc.titleManipulation of stored charge density and polarity in anodic aluminium oxide for silicon solar cell passivation
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume77
dc.date.issued2015
local.identifier.absfor090605 - Photodetectors, Optical Sensors and Solar Cells
local.identifier.ariespublicationU3488905xPUB6864
local.type.statusPublished Version
local.contributor.affiliationLu, Zhong, University of New South Wales
local.contributor.affiliationOuyang, Z, University of New South Wales
local.contributor.affiliationGrant, Nicholas, College of Engineering and Computer Science, ANU
local.contributor.affiliationWan, Yimao, College of Engineering and Computer Science, ANU
local.contributor.affiliationYan, Di, College of Engineering and Computer Science, ANU
local.contributor.affiliationLennon, Alison, University of New South Wales
local.description.embargo2037-12-31
local.bibliographicCitation.startpage816
local.bibliographicCitation.lastpage821
local.identifier.doi10.1016/j.egypro.2015.07.115
dc.date.updated2016-02-24T10:12:34Z
local.identifier.scopusID2-s2.0-84948419213
CollectionsANU Research Publications

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