Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/138482
Title: Effect of post-annealing on cation substituted kesterite solar cells
Authors: Susilo, Richardus
Keywords: Engineering::Materials::Energy materials
Issue Date: 2020
Publisher: Nanyang Technological University
Abstract: Kesterite Cu2ZnSnS4 (CZTS) is a cost-efficient, environmentally friendly, and stable photovoltaic material comprising of earth-abundant elements. However, the record power conversion efficiency for such solar cells has been stagnant mainly due to high VOC deficit. The primary cause of the large VOC deficit is non-radiative recombination within the heterojunction region. Heat treatment (post-annealing) is one of the ways to reduce heterojunction recombination. This report focuses on the effect of post-annealing temperature, duration, and post-annealing step (that is, post-annealing after CdS deposition or after ITO deposition) on the IV and EQE characteristics of kesterite solar cells. The concept of double post-annealing is also explored, which is the first study in this research field. EQE results suggest increased light absorption for post-annealed samples, specifically in the mid-wavelength region (500-800 nm). Moreover, post-annealing after ITO further increases the light absorption in the low wavelength region (< 400 nm). IV characteristics shows the optimum temperature for post annealing temperature after ITO and CdS are 270 oC and 315 oC respectively. Highest efficiency of 10.2 % was observed for sample post-annealed after CdS at 315 oC for 5 minutes. On the other hand, double post-annealing provides no improvement in solar cell performance compared to single post-annealing.
URI: https://hdl.handle.net/10356/138482
Fulltext Permission: restricted
Fulltext Availability: With Fulltext
Appears in Collections:MSE Student Reports (FYP/IA/PA/PI)

Files in This Item:
File Description SizeFormat 
FYP Report Richardus.pdf
  Restricted Access
1.29 MBAdobe PDFView/Open

Page view(s)

263
Updated on Feb 6, 2023

Download(s) 50

23
Updated on Feb 6, 2023

Google ScholarTM

Check

Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.