Just from the paper (OP), they do not show their measurement setup on the electronics (I and V) side. Simply measuring the I-V characteristics of a quantum-sen

Just from the paper (OP), they do not show their measurement setup on the electronics (I and V) side. Simply measuring the I-V characteristics of a quantum-sensitive device is a far cry from showing that it will spontaneously deliver both I and V -- i.e. power out. Even if it did, it might be through cooling of one of the masses involved. I.e., cooling of the thermal mass in a mirror or metal electrode. They are talking about harvesting, after all. [Edit: the APS paper also refers to hot carriers; sounds very much like coupling to the solid state.]