1. Department of Physics and Centre for Processable Electronics, Imperial College London, London SW7 2AZ, UK
2. Oninn, Av. José Cândido da Silveira 2000 - Horto Florestal, Belo Horizonte, MG31035-536, Brazil
3. Department of Chemistry and Centre for Processable Electronics, Imperial College London, London W12 0BZ, UK
4. Department of Materials and Centre for Processable Electronics, Imperial College London, London SW7 2AZ, UK
5. KAUST Solar Center, Physical Science and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia