Hindered amine compounds which are substituted by a long hydrocarbon chain are useful in a number of applications where the solubility or compatibility afforded by said substitution is needed. The additives include 1) alkali metal or transition metal salts of carboxylic acids; 2) 1,3,5-tris alkyl- or 1,3,5-tris -hexahydro-s-triazine compounds; and 3) C1-12 carboxylate salts of quaternary ammonium compounds. The photodiode has a first semiconductor layer capable of absorbing incident radiation having a first spectral distribution without generating a photocurrent, while simultaneously transmitting incident radiation having a second spectral distribution to the intrinsic layer for generating a photocurrent. In some arrangements, the DLP circuitry is configured by a user to allow only authorized apps to send sensitive information andor block retransmission of the sensitive information. The protective coating dispensing device coats the inner surface of each of the plurality of outlet apertures by dispensing a measured amount of the protective coating to completely clog each of the plurality of outlet apertures by at least one of spraying the aperture plate unit with the protective coating and rolling the protective coating onto the aperture plate unit.