Investigating the Optoelectronic Properties of Zinc Phosphide Thin Films via Optical-pump Terahertz Probe Spectroscopy

Ms. Yinghong Huang1, Ms. Xinyun Liu1, Dr. Rajrupa Paul2, Dr. Elias Stutz2, Dr. Mahdi Zamani2, Dr. Djamshid Damry1, Ms. Léa Buswell2, Dr. Simon Steinvall2, Dr. Jean-Baptiste Leran2, Dr. Mirjana Dimitrievska2, Prof. Anna Fontcuberta i Morral2, Dr. Jessica Boland1
1The University of Manchester, Manchester, United Kingdom. 2École Polytechnique Fédérale de Lausanne, Lausanne, Swaziland


Zinc phosphide (Zn3P2) is a promising earth-abundant material for solar cell applications but calls for the further understanding of its optoelectronic properties. In this work, we perform contact-free and noninvasive optical-pump terahertz probe (OPTP) spectroscopy on various Zn3P2 thin film samples and extract the crucial material properties – carrier lifetime and mobility - that dominate the electron transport and device performance, from the OPTP THz radiation response.