The transient photovoltaic (PV) characteristic of HgCdTe PV array is studied using an ultrafast laser. The photoresponse shows an apparent negative valley first. then it evolves into a positive peak. By employing a combined theoretical model of pn junction and Schottky potential. https://www.jmannino.com/special-deal-A-Magazine-Curated-By-Sacai-quick-pick/