1. European Commission (2015). Paris Agreement, 21st Conference of the Parties.
2. International Energy Agency (2016). World Energy Outlook 2016. http://www.worldenergyoutlook.org/publications/weo-2016/.
3. A fundamental look at supply side energy reserves for the planet;Perez;IEA/SHC Solar Update,2015
4. Result of the search ‘PV and solar cell’ in the Web of Science. Accessed on 06/01/2017. https://webofknowledge.com/.
5. World Economic Forum (2016). Top 10 emerging technologies of 2016. https://www.weforum.org/agenda/2016/06/top-10-emerging-technologies-2016/.