  This paper proposes a novel conceptual system of optical wireless power
transfer between objects, whether stationary or in-motion. Different from the
currently existing optical wireless power transfer systems, where the optical
transmitter and receiver are two distinct devices, the proposed system in this
paper employs a single device - an optical transceiver, which is capable of
working as both light absorption and emission. This optical transceiver is
fabricated from a metal halide perovskite which yields superior features such
as low costs, capability of flexibly attached on curved surfaces, thin and
light weight. Therefore, the whole system size and cost can be significantly
reduced, while perovskite transceivers can be made adaptive to any surface.
This will contribute to realize a thing-to-thing optical wireless power
transfer system, in which surfaces of objects/things are covered (fully or
partially) by perovskite transceivers, enabling them to wirelessly charge or
discharge from the others.
