Premium
Spatial Atomic Layer Deposition of Molybdenum Oxide for Industrial Solar Cells
Author(s) -
Gregory Geoffrey,
Luderer Christoph,
Ali Haider,
Sakthivel Tamil S.,
Jurca Titel,
Bivour Martin,
Seal Sudipta,
Davis Kristopher O.
Publication year - 2020
Publication title -
advanced materials interfaces
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.671
H-Index - 65
ISSN - 2196-7350
DOI - 10.1002/admi.202000895
Subject(s) - materials science , passivation , x ray photoelectron spectroscopy , heterojunction , optoelectronics , atomic layer deposition , molybdenum , amorphous silicon , silicon , layer (electronics) , solar cell , oxide , amorphous solid , crystalline silicon , nanotechnology , chemical engineering , metallurgy , chemistry , engineering , organic chemistry
Abstract Molybdenum oxide thin films are successfully deposited using spatial atomic layer deposition (SALD), a tool designed for high‐throughput industrial film growth. The structural and optical properties of the film are evaluated using ultraviolet photoelectron spectroscopy, high‐resolution transmission electron microscopy, and spectroscopic ellipsometry. To demonstrate the applicability of molybdenum oxide in industrial settings the films are applied as hole‐selective silicon heterojunction contacts for solar cells. When paired with intrinsic amorphous silicon passivation layers, implied open‐circuit voltages of 699 mV are achieved. The carrier transport is unaffected by low‐temperature contact anneals up to 300 °C with contact resistivities of ≈ 10 mΩ cm 2 . Finally, the optical performance of silicon solar cells featuring different front hole‐selective heterojunction structures are simulated. It is shown that the generation current density of heterojunction solar cells can be significantly increased with the addition of SALD molybdenum oxide contacts.