The Internet of Things (IoT) is the network of physical objects—devices, vehicles, buildings and other items—embedded with electronics, software, sensors, and network connectivity that enables these objects to collect and exchange data. The number of applications in the fields of industrial and environmental monitoring, energy management, building and home automation is growing exponentially. The powering of all these objects is then a major concern, their autonomy is a requirement. The solutions to get these objects autonomous is closely linked to the energy harvesting from the surroundings.

Photovoltaic is one of this energy harvesting method from light. Moreover, the Perovskite based PV is an emerging technology with the promise of very efficient devices with high performances well over 20%, already demonstrated for small area lab-scale devices (ca 10 mm² or below). But yet, a number of challenges are still to be met to ensure a bright industrial future for Perovskite Solar Cells (PSCs): the development of large scale efficient modules with industrial processing route, and good stability.

The first focus of this work is the development from Perovskite cells of NIP planar architectures (surface of 0.30 cm²) to efficient solar modules with a processing route compatible with large scale production. The different layers of charge transport materials or Perovskite active materials are deposited by wet process on the whole surface of 5x5 cm² glass substrates. Those layers and the metal electrode are structured with a picosecond laser to obtain modules with performances > 10%. The laser ablation is used to structure the different layers and to create the crucial step of serial association of the multiple cells and allows high Geometrical Fill Factor > 90%.

In a second part, we will present the performances of PSCs and modules in indoor environments, typically in the range of 200 to 1000 lux with artificial lightings. Their behavior will be studied with different lighting sources and with the variable illumination measurement method (VIM irradiance around 0,001 W/m² to more than 5 suns). The results will be discussed in function of the lighting conditions (irradiance and lighting source) and the impact of the passage from cells to module will be studied.

Preliminary results obtained on PSCs of 0.30 cm² under artificial light at 200 lux (Neon tube) in air without encapsulation are very promising with power densities over 40 microW.cm^-², exceeding the performances of amorphous silicon cells, recognized technology for indoor applications.