Ultra-thin passivation layers in Cu(In,Ga)Se₂ thin-film solar cells: full-area passivated front contacts and their impact on bulk doping.

ABSTRACT: In the search for highly transparent and non-toxic alternative front layers replacing state-of-the-art CdS in Cu(In,Ga)Se₂ thin-film solar cells, alternatives rarely exceed reference devices in terms of efficiency. Full-area ultra-thin aluminium oxide tunnelling layers do not require any contact patterning and thus overcome the main drawback of insulating passivation layers. Even a few monolayers of aluminium oxide can be deposited in a controlled manner by atomic layer deposition, they show excellent interface passivation properties, low absorption, and suitable current transport characteristics on test devices. Depositing a ZnO-based transparent front contact, however, results in extremely poor solar cell performance. The issue is not necessarily a low quality of the alternati

SUBMITTER: Werner F 

PROVIDER: S-EPMC7200765 | biostudies-literature | 2020 May

REPOSITORIES: biostudies-literature