Investigation of optical, electrical and optoelectronic properties of SnSe crystals Kunjal Patel, Gunvant Solanki, Kireetkumar Patel, Vivek Pathak and Payal Chauhan Eur. Phys. J. B, 92 9 (2019) 200 Published online: 09 September 2019 DOI: 10.1140/epjb/e2019-100306-8