The Investigation of TiO2 Nanostructures on Performance of Perovskite Solar Cells

Zhiwei Ren, Changwen Liu, Annie Ng, Charles Surya

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

In this work, we have studied the effects of the compact TiO2 (c-TiO2) and mesoscopic TiO2 (mp-TiO2) layers on the performance of the perovskite based solar cells (PSCs). It is found that the increased interfacial area between the mesoscopic electron transport layer (ETL) and perovskite can enhance the device efficiency, particularly for the fill factor. We have then synthesized TiO2 nanorods (TiO2-NR) and incorporated it into PSCs, in which the interfacial area between perovskite and TiO2-NA is further increased. A hysteresis-free PSC with the power conversion efficiency (PCE) of 19 % can be obtained by using TiO2-NR as the ETL. The results of femtosecond transient absorption (fs-TA) clearly show that the carrier extraction efficiency is significantly enhanced due to substantial increase of the interfacial area between the perovskite and ETL nanostructures, resulting in a reduction in carrier diffusion distance.

Original languageEnglish
Title of host publication2018 IEEE International Conference on Electron Devices and Solid State Circuits, EDSSC 2018
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781538662342
DOIs
Publication statusPublished - 9 Oct 2018
Event2018 IEEE International Conference on Electron Devices and Solid State Circuits, EDSSC 2018 - Shenzhen, China
Duration: 6 Jun 20188 Jun 2018

Publication series

Name2018 IEEE International Conference on Electron Devices and Solid State Circuits, EDSSC 2018

Conference

Conference2018 IEEE International Conference on Electron Devices and Solid State Circuits, EDSSC 2018
Country/TerritoryChina
CityShenzhen
Period6/06/188/06/18

Keywords

  • compact TiO
  • electron transport layer
  • mesoscopic TiO
  • perovskite solar cells
  • TiO nanorods

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

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