Elucidating the effect of shunt losses on the performance of mesoporous perovskite solar cells

Ranbir Singh, Sanjay Sandhu, Jae Joon Lee

Research output: Contribution to journalArticlepeer-review

72 Scopus citations

Abstract

Mesoporous perovskite solar cells (MPSCs) suffer from various types of charge carrier losses, where shunt losses usually dominate. Herein, we perform a systematic study to investigate the impact of such losses on the photovoltaic performance of methylammonium lead iodide (MAPbI3)-based MPSCs. The shunt losses in the MPSCs are attributed to the leakage current and the non-geminated recombination losses. We also demonstrate that these losses can be reduced by the incorporation of appropriate thickness of compact titanium oxide (c-TiO2) interlayer between FTO and mesoporous TiO2 (m-TiO2). As a result, MPSCs exhibit higher open-circuit voltage (VOC) of 1.05 V, short-circuit current density (JSC) of 23.27 mA cm−2, and the power conversion efficiency (PCE) of 17.69% under one-sun illumination conditions. The improved device performance was attributed to (i) the efficient blocking of holes, (ii) the decrease of leakage current, and (iii) the suppression of the non-geminated recombination losses in the cells. The effect of the c-TiO2 layer thickness on the series resistance (RS), shunt resistance (RSh), and the non-geminated recombination were also discussed in detail.

Original languageEnglish
Pages (from-to)956-961
Number of pages6
JournalSolar Energy
Volume193
DOIs
StatePublished - 15 Nov 2019

Keywords

  • Electron transport layer
  • Leakage current
  • Non-geminated recombination losses
  • Perovskite solar cell
  • Series and shunt resistance

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