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

Research output: Journal article publicationJournal articleAcademic researchpeer-review

34 Citations (Scopus)


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 (MoO 3/Au/MoO 3) 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 MoO 3/Au/MoO 3 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
Publication statusPublished - 1 Jun 2018


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

ASJC Scopus subject areas

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


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