Towards All-Inorganic Transport Layers for Wide-Band-Gap Formamidinium Lead Bromide-Based Planar Photovoltaics

Marinus Van Hest, Anand Subbiah, Neha Mahuli, Sumanshu Agarwal, Shaibal Sarkar

Research output: Contribution to journalArticlepeer-review

8 Scopus Citations


Hybrid perovskite photovoltaic devices heavily rely on the use of organic (rather than inorganic) charge-transport layers on top of a perovskite absorber layer because of difficulties in depositing inorganic materials on top of these fragile absorber layers. However, in comparison to the unstable and expensive organic transport materials, inorganic charge-transport layers provide improved charge transport and stability to the device architecture. Here, we report photovoltaic devices using all-inorganic transport layers in a planar p-i-n junction device configuration using formamidinium lead tribromide (FAPbBr3) as an absorber. Efficient planar devices are obtained through atomic layer deposition of nickel oxide and sputtered zinc oxide as hole- and electron-transport materials, respectively. Using only inorganic charge-transport layers resulted in planar FAPbBr3 devices with a power conversion efficiency of 6.75% at an open-circuit voltage of 1.23 V. The transition of planar FAPbBr3 devices making from all-organic towards all-inorganic charge-transport layers is studied in detail.
Original languageAmerican English
Pages (from-to)1800-1806
Number of pages7
JournalEnergy Technology
Issue number10
StatePublished - 2017

NREL Publication Number

  • NREL/JA-5K00-70190


  • atomic layer deposition
  • inorganic transport layer
  • nickel oxide
  • perovskite solar cells
  • wide band gap


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