Enhanced Efficiency of Semitransparent Perovskite Solar Cells via Double-Sided Sandwich Evaporation Technique for Four Terminal Perovskite-Silicon Tandem Application

Jia-Ci Jhou; Ashish Gaurav; Chung-Han Chang; Ching-Fuh Lin

doi:10.3390/nano12091569

Enhanced Efficiency of Semitransparent Perovskite Solar Cells via Double-Sided Sandwich Evaporation Technique for Four Terminal Perovskite-Silicon Tandem Application

Nanomaterials (Basel). 2022 May 5;12(9):1569. doi: 10.3390/nano12091569.

Authors

Jia-Ci Jhou¹, Ashish Gaurav¹, Chung-Han Chang¹, Ching-Fuh Lin^{1

2}

Affiliations

¹ Graduate Institute of Photonics and Optoelectronics, National Taiwan University, Taipei 10617, Taiwan.
² Graduate Institute of Electronics Engineering, National Taiwan University, Taipei 10617, Taiwan.

Abstract

Halide perovskite based solar cells (PSC's) have shown tremendous potential based on its facile fabrication technique, and the low cost of perovskite thin film formation with efficiency passing through an unmatched growth in recent years. High quality film along with morphology and crystallinity of the perovskite layer influences the efficiency and other properties of the perovskite solar cell (PSC). Furthermore, semitransparent perovskite solar cells (ST-PSC) are an area of attraction due to its application in tandem solar cells, although various factors like suitable transparent rear electrodes and optimized technique limit the power conversion efficiency (PCE). In this article, we fabricated perovskite film using a technique termed Double-sided sandwich evaporation technique (DS-SET) resulting in high quality perovskite film (MAPbI₃ and MAPbI_xCl_3-x). Using this fabrication approach as compared to the traditional spin-coating method, we reported an enhanced photovoltaic performance of the PSC with a better surface morphology and homogeneity. The best parameter via DS-SET was found to be SET 30 min, which demonstrated a PCE (%) up to 14.8% for MAPbI₃ and 16.25% for MAPbI_xCl_3-x, respectively. Addressing the tandem solar cell, incorporating thin Ag as a transparent electrode with a thickness of 20 nm onto the PSC's as the top cell and further combining with the Si solar cell results in the four terminal (4T) tandem solar cell exhibiting a PCE (%) of 24.43%.

Keywords: double-sided sandwich evaporation technique; four-terminal; perovskite solar cell; power conversion efficiency; sandwich structure; tandem solar cell; transparent electrodes.

Grants and funding

This research was funded by Ministry of Science and Technology in Taiwan for supporting the research with the contract numbers: MOST 108-2218-E-002-032-MBK, MOST 108-2221-E-002-145-MY3, MOST 107-2221-E-002-172-MY3.