Electrical Properties of pn Junction in Depletion Mode 
References
Books
Donald A. Neamen, Semiconductor Physics and Devices, McGraw-Hill Education, 2012
Simon M. Sze and Kwok K. Ng, Physics of Semiconductor Devices, Wiley-Interscience, 2006 (3rd Edition)
Ben G. Streetman and Sanjay Banerjee, Solid State Electronic Devices, Pearson, 2015 (7th Edition)