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Inferring Dislocation Recombination Strength in Multicrystalline Silicon via Etch Pit Geometry Analysis
Massachusetts Institute of Technology, Camebridge, MA, USA.
Massachusetts Institute of Technology, Camebridge, MA, USA.
Massachusetts Institute of Technology, Camebridge, MA, USA.
Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för ingenjörsvetenskap och fysik.ORCID-id: 0000-0003-2181-3820
Vise andre og tillknytning
2014 (engelsk)Konferansepaper, Poster (with or without abstract) (Annet vitenskapelig)
Abstract [en]

Dislocations limit solar cell performance bydecreasing minority carrier diffusion length, leading to inefficientcharge collection at the device contacts. However, studieshave shown that the recombination strength of dislocationclusters within millimeters away from each other can vary byorders of magnitude. In this contribution, we present correlations between dislocation microstructure and recombination activity levels which span close to two orders of magnitude. We discuss a general trend observed: higherdislocation recombination activity appears to be correlated witha higher degree of impurity decoration, and a higher degree ofdisorder in the spatial distribution of etch pits. We present anapproach to quantify the degree of disorder of dislocationclusters. Based on our observations, we hypothesize that therecombination activity of different dislocation clusters can bepredicted by visual inspection of the etch pit distribution andgeometry.

sted, utgiver, år, opplag, sider
2014.
Emneord [en]
cluster, dislocations, etch pit, multicrystalline, recombination activity, recombination strength, silicon, solar
HSV kategori
Forskningsprogram
Fysik
Identifikatorer
URN: urn:nbn:se:kau:diva-33995OAI: oai:DiVA.org:kau-33995DiVA, id: diva2:752463
Konferanse
14th IEEE Photovoltaic Specialists Conference, June 8-13, Denver, Colorado
Merknad

This poster got a poster award.

Tilgjengelig fra: 2014-10-03 Laget: 2014-10-03 Sist oppdatert: 2017-12-13bibliografisk kontrollert

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