Next-generation rooftop tribo–piezo electric energy harvesting from rain power

  • Sreenidhi Prabha RajeevEmail author
  • Shajimon K. John
  • Riboy Cherian
  • Subash Cherumannil Karumuthil
  • Soney Varghese
Original Article


In the present paper, authors report on the fabrication and testing of an energy harvester using polymer blends of PVDF and PDMS from raindrops. The films were characterised using microscopy techniques for morphology and frictional properties. The piezo–ferro–triboelectric nature of the blends was analysed using electrostatic force microscopy (EFM). The infrared (IR) spectroscopy was used for phase enhancements in neat as well as blends of the polymer. Three different configurations of the devices were fabricated and tested with polymer blend metal contact yielding an output of 16 V and 15.4 nA for a piezo–tribo area of 2.25 cm2. The charging characteristics of the device yielded a power density of 0.177 µW/cm2, and the device was also tested for knock sensing applications. A prototype of tribo–ferro energy harvester installed on a modelled house rooftop yielded an output voltage of 0.795 V for 10 ml of water dropped from 8 cm.


Piezo–triboelectric effect DC-EFM Energy harvesting 


Compliance with ethical standards

Conflict of interest

On behalf of all authors, the corresponding author states that there is no conflict of interest.

Supplementary material

13204_2019_1184_MOESM1_ESM.docx (9.8 mb)
Supplementary material 1 (DOCX 9999 kb)

Supplementary material 1 (avi 34,489 kb)


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Copyright information

© King Abdulaziz City for Science and Technology 2019

Authors and Affiliations

  1. 1.Nanomaterials and Devices Research Laboratory, School of Materials Science and EngineeringNational Institute of Technology CalicutCalicutIndia
  2. 2.Department of Electronics and Communication EngineeringUKF College of Engineering and TechnologyKollamIndia
  3. 3.Department of Electronics and Communication EngineeringSaintgits College of EngineeringKottayamIndia

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