Journal Article

FZJ-2021-00872

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Influence of Oxygen on Sputtered Titanium‐Doped Indium Oxide Thin Films and Their Application in Silicon Heterojunction Solar Cells

Yao, Z.FZJ* ; Duan, W. (Corresponding author)FZJ* ; Steuter, P.FZJ* ; Hüpkes, J.FZJ* ; Lambertz, A.FZJ* ; Bittkau, K.FZJ* ; Pomaska, M.FZJ* ; Qiu, D.FZJ* ; Qiu, K.FZJ* ; Wu, Z.FZJ* ; Shen, H. ; Rau, U.FZJ* ; Ding, K.FZJ*

2021
Wiley-VCH Weinheim

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Please use a persistent id in citations: http://hdl.handle.net/2128/27096  doi:10.1002/solr.202000501

Abstract: One of the challenges in fabricating high‐performance n‐type silicon heterojunction (SHJ) solar cells is developing a high‐quality transparent conductive oxide (TCO) electrode. Herein, the development and application of low‐temperature sputtered titanium‐doped indium oxide (ITiO) in n‐type, rear junction SHJ solar cells as a function of the oxygen flow ratio is presented. The microstructure, morphology, and optoelectronic properties are analyzed. The grain size of ITiO thin films decreases rapidly as the oxygen flow ratio is increased. Compared with an indium tin oxide (ITO) thin film, ITiO shows a superior balance in achieving excellent optoelectronic properties by reducing film resistivity but maintaining weak absorption. Higher fill factor is obtained by substituting ITiO for ITO as the front electrode in SHJ solar cells, which is mainly due to the improved carrier transport. Resistivity contributions of front‐side vertical and lateral carrier transport are disclosed by Quokka3 simulation. A champion cell efficiency of 23.81% with ITiO is achieved, which is so far the highest efficiency among the application of ITiO in SHJ solar cells to the best of our knowledge. The study demonstrates that ITiO is a promising TCO candidate for SHJ solar cells.

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Contributing Institute(s):

1. Photovoltaik (IEK-5)

Research Program(s):

1. 121 - Photovoltaik und Windenergie (POF4-121) (POF4-121)

Appears in the scientific report 2021

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Database coverage:
; ; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; DEAL Wiley ; Essential Science Indicators ; Science Citation Index Expanded ; Web of Science Core Collection

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