Strategies for high performance perovskite/crystalline silicon four-terminal tandem solar cells

Zhiwei Ren, Jixiang Zhou, Yaokang Zhang, Annie Ng, Qian Shen, Sin Hang CHEUNG, Hui Shen*, Kan Li, Zijian Zheng, Shu Kong SO, Aleksandra B. Djurišić, Charles Surya

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

In this work, we report systematic studies on improving the optical and electrical properties of four-terminal perovskite/c-Si tandem solar cells. Light harvesting power of the device is significantly enhanced due to the complementary absorption spectra of the perovskite and c-Si absorber materials. To obtain high power conversion efficiency (PCE) for the device, careful engineering of optoelectronic properties of the devices are accomplished through: 1. Oxygen annealing treatment for reducing defect density of perovskite materials; 2. Optical engineering of the transparent electrode (MoO3/Au/MoO3) to obtain high transmission at long wavelengths for the tandem solar cell applications; and 3. Enhancement of light harvesting power achieved by using the novel biomimicking elastomeric petals as the light trapping layer. The individual perovskite solar cell (PSC) with MoO3/Au/MoO3 electrode with or without light trapping layer yields an average PCE of 16.6% and 16.0% respectively. By combining c-Si bottom cell with perovskite top cell mechanically, an overall PCE of 22.4% is achieved for the averaged value, which is a promising result for future development of perovskite based tandem solar cells.

Original languageEnglish
Pages (from-to)36-44
Number of pages9
JournalSolar Energy Materials and Solar Cells
Volume179
DOIs
Publication statusPublished - 1 Jun 2018

Scopus Subject Areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films

User-Defined Keywords

  • Biomimicking elastomeric petals
  • Oxygen annealing
  • Perovskites
  • Silicon
  • Tandem solar cells
  • Transparent electrodes

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