Journal
ACS NANO
Volume 8, Issue 7, Pages 6797-6804Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nn501096h
Keywords
perovskite solar cells; carbon nanotubes; laminated; vacuum-free; hole transporter free
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Funding
- National Research Foundation (NRF), Singapore through CRP Award [NRF-CRP4-2008-03]
- Singapore-Berkeley Research Initiative for Sustainable Energy (SinBeRISE) CREATE program
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Organic inorganic metal halide perovskite solar cells were fabricated by laminating films of a carbon nanotube (CNT) network onto a CH(3)NH(3)Pbl(3) substrate as a hole collector, bypassing the energy-consuming vacuum process of metal deposition. In the absence of an organic hole-transporting material and metal contact, CH(3)NH(3)Pbl(3) and CNTs formed a solar cell with an efficiency of up to 6.87%. The CH(3)NH(3)Pbl(3)/CNTs solar cells were semitransparent and showed photovoltaic output with dual side illuminations due to the transparency of the CNT electrode. Adding spiro-OMeTAD to the CNT network forms a composite electrode that improved the efficiency to 9.90% due to the enhanced hole extraction and reduced recombination in solar cells. The interfacial charge transfer and transport in solar cells were investigated through photoluminescence and impedance measurements. The flexible and transparent CNT network film shows great potential for realizing flexible and semitransparent perovskite solar cells.
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