Journal
NANO ENERGY
Volume 55, Issue -, Pages 470-476Publisher
ELSEVIER
DOI: 10.1016/j.nanoen.2018.11.004
Keywords
NiO@CSs-composite; Organic hole-conductor free; Metal-electrode free; Perovskite solar cell
Categories
Funding
- National Natural Science Foundation of China [51772096]
- Beijing Natural Science Foundation [L172036]
- Ministry of Education [6141A020225]
- Beijing Municipal Science and Technology Project [Z161100002616039]
- Fundamental Research Funds for the Central Universities [2016JQ01, 2017ZZD02]
- NCEPU Double First-Class Graduate Talent Cultivation Program
- Par-Eu Scholars Program
- Science and Technology Beijing 100 Leading Talent Training Project
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Efficiencies of perovskite solar cells (PSCs) are now hitting such high levels that scalable fabrication at low-cost is becoming pivotal. However, this remains challenging due to expensive metal electrodes and organic holetransporting materials (OHTMs) typically used in PSCs. By simplifying the device structure, OHTMs-free and noble metal-electrodes-free planar PSCs with the aperture area of 1 cm(2) are fabricated with novel NiO@CSs-composite electrodes. The distribution of hole-accepting nickel oxide (NiO) as closely-packed shells on the core carbon spheres (CSs) in the rambutan-like NiO@CSs-composite enhances the photogenerated hole collection efficiency and reduces recombination loss. The small porosity of this composite inhibits the intrusion of the oxygen/moisture through the counter electrode, thus enabling a stable device's efficiency of 11.70% up to 1500 h under 40-60% humidity without encapsulation. The ability to fabricate large-sized planar devices with NiO@CSs-composite electrodes represents a significant step towards the cost-effective and scalable manufacturing with numerous possibilities to choose and optimize the materials, and device's architecture.
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