Efficiency and Stability enhancement of Hysteresis-Free Planar Inverted Perovskite Solar Cells via the addition of metal nanoparticles in the Hole Transport Layer
Emmanuel Kymakis a, George Kakavelakis a b
a Technological Educational Institute of Crete, Estavromenos P.B 1939, Heraklion, 0, Greece
b Department of Materials Science and Technology, University of Crete, Heraklion, 710 03 Crete, Greece, Greece
Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics
Proceedings of International Conference Asia-Pacific Hybrid and Organic Photovoltaics (AP-HOPV17)
Yokohama-shi, Japan, 2017 February 2nd - 4th
Organizers: Tsutomu Miyasaka and Iván Mora-Seró
Oral, George Kakavelakis, presentation 090
Publication date: 7th November 2016

The effect of introducing surfactant free Au, Ag and Al nanoparticles, produced by ultrafast laser ablation in liquids, in the PEDOT:PSS hole transport layer of planar inverted perovskite solar cells was systematically studied. The Ag nanoparticles incorporation lead to the highest power conversion efficiency improvement (~12%)  among the other nanoparticle doped devices compared to the pristine. This efficiency gain was attributed to improved hole extraction due to the enhanced conductivity of the Ag nanoparticles doped hole transport layer. This argument was supported by the combinatorial study of photoluminescence spectroscopy and conductivity measurements of the PEDOT:PSS/CH3NH3PbI3-xClx coated glass substrates with and without the addition of the different metal nanoparticles in the hole transport layer. On the other hand, the Al nanoparticles based cells significantly increased the stability of the devices. This result was attributed to the stabilization of the PEDOT:PSS/CH3NH3PbI3-xClx interface. Finally, the addition of both Ag and Al NPs in the hole transport layer resulted a simultaneous enhancement in the efficiency (12.4% highest) and stability of the device compared to the undoped device.

G. Kakavelakis et. al., 2016, Submitted

This work was financially supported by the Research Projects for Excellence IKY/Siemens.

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