1 research outputs found
Solution Synthesized <i>p</i>‑Type Copper Gallium Oxide Nanoplates as Hole Transport Layer for Organic Photovoltaic Devices
<i>p</i>-Type metal-oxide hole transport layer (HTL)
suppresses recombination at the anode and hence improves the organic
photovoltaic (OPV) device performance. While NiO<sub><i>x</i></sub> has been shown to exhibit good HTL performance, very thin
films (<10 nm) are needed due to its poor conductivity and high
absorption. To overcome these limitations, we utilize CuGaO<sub>2</sub>, a <i>p</i>-type transparent conducting oxide, as HTL
for OPV devices. Pure delafossite phase CuGaO<sub>2</sub> nanoplates
are synthesized via microwave-assisted hydrothermal reaction in a
significantly shorter reaction time compared to via conventional heating.
A thick CuGaO<sub>2</sub> HTL (∼280 nm) in polyÂ(3-hexylthiophene):[6,6]-phenyl-C61-butyric
acid methyl ester (P3HT:PCBM) devices achieves 3.2% power conversion
efficiency, on par with devices made with standard HTL materials.
Such a thick CuGaO<sub>2</sub> HTL is more compatible with large-area
and high-volume printing process