Abstract: A polymer mixture emits a broad spectrum of visible light that appears white or near-white in the aggregate. The polymer mixture comprises two (or more) components in the active layer. A heavy atom, such as platinum and/or iridium, present in the backbone of the mixture acts via a spin-orbit coupling mechanism to cause the ratio of fluorescent to phosphorescent light emission bands to be of approximately equal strength. These two broad emissions overlap, resulting in an emission spectrum that appears to the eye to be white.

Abstract: A photovoltaic device and a method for preparing same are described. The photovoltaic device comprises at least one pair of electrodes, wherein each member of the at least one pair of electrodes having a different working function than the other member of that pair; and one or more layers of graphene located between the two electrodes, wherein the one or more layers made of graphene have a lower working function than a working function of one member of the at least one pair of electrodes, and a higher working function than a working function of the other member of the at least one pair of electrodes, thereby allowing generation of an electric field across the photovoltaic device without applying any external voltage to the electrodes, in response to solar radiation impinging the device. Optionally, one or both electrodes have a coating of a different buffering material than the other.

Abstract: A class of organic light-emitting diodes (OLEDs) emit light tailored to the absorption spectra of growing plants. Upon photoexcitation, the OLEDs generate light in both the blue-green and red regions of the visible spectrum. A heavy metal atom present in the ?-conjugated polymer chain (such as platinum and/or iridium) acts via the spin-orbit coupling mechanism to cause an enhancement of the ratio of fluorescent to phosphorescent emission to be of approximately equal strength. These two emission bands overlap the absorption spectra of common plants grown under hydroponic conditions.

Abstract: A polymer mixture emits a broad spectrum of visible light that appears white or near-white in the aggregate. The polymer mixture comprises two (or more) components in the active layer. A heavy atom, such as platinum and/or iridium, present in the backbone of the mixture acts via a spin-orbit coupling mechanism to cause the ratio of fluorescent to phosphorescent light emission bands to be of approximately equal strength. These two broad emissions overlap. resulting in an emission spectrum that appears to the eye to be white.