Abstract
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 language | American English |
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Pages (from-to) | 1800-1806 |
Number of pages | 7 |
Journal | Energy Technology |
Volume | 5 |
Issue number | 10 |
DOIs | |
State | Published - 2017 |
NREL Publication Number
- NREL/JA-5K00-70190
Keywords
- atomic layer deposition
- inorganic transport layer
- nickel oxide
- perovskite solar cells
- wide band gap