Synergistic Approach toward Erbium-Passivated Triple-Anion Organic-Free Perovskite Solar Cells with Excellent Performance for Agrivoltaics Application

M. Bilal Faheem, Bilawal Khan, Chao Feng, Syed Bilal Ahmed, Jiexuan Jiang, Mutee Ur Rehman, W. S. Subhani, M. U. Farooq, Jinlan Nie, M. M. Makhlouf, Quinn Qiao

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

All-inorganic perovskite solar cells (IPSCs) have gained massive attention due to their less instability against common degradation factors (light, heat, and moisture) than their organic-inorganic hybrid counterparts. Inorganic perovskites bear a general formula of CsPbX3 (X = Cl, I, Br). The mixed halide CsPbIBr2 perovskite possesses an intermediate band gap of 2.03 eV with enhanced stability, which is still available for photovoltaic applications and the research focus of this work. We present a synergistic approach of pre-heated solution dropping with inorganic additive inclusion to deposit the organic-free triple anion CsPbIBr2 PSC. Erbium (Er)-passivated triple-anion CsI(PbBr2)0.97(ErCl3)0.03 IPSCs with inorganic carrier selective layers (CTLs), that is, organic-free, are fabricated with enhanced carrier diffusion length and crystalline grain size while lessening the grain boundaries near perovskite active layer (PAL)-bulk/carrier selective interfaces. As a result, the trap-state densities within the perovskite bulk were suppressed with stabilized CTL/PAL interfaces for smooth and enhanced carrier transportation. Therefore, for the first time, we contradict the common belief of VOC loss due to halide segregation, as a nice VOC of about 1.34 V is achieved for an organic-free IPSC through enriching initial radiative efficiency, even when halide segregation is present. The optimized organic-free IPSC yielded a power conversion efficiency of 11.61% and a stabilized power output of 10.72%, which provides the potential opportunity to integrate into agrivoltaics (AgV) projects.

Original languageEnglish (US)
Pages (from-to)6894-6905
Number of pages12
JournalACS Applied Materials and Interfaces
Volume14
Issue number5
DOIs
StatePublished - Feb 9 2022

Keywords

  • agrivoltaics
  • initial radiative efficiency
  • organic-free Perovskite solar cell
  • pre-heated solution dropping
  • stabilized power output

ASJC Scopus subject areas

  • Materials Science(all)

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