Luminescent solar concentrators. 2: Experimental and theoretical analysis of their possible efficiencies
Experimental techniques are developed to determine the applicability of a particular luminescing center for use in a luminescent solar concentrator (LSC). The relevant steady-state characteristics of eighteen common organic laser dyes are given. The relative spectral homogeneity of such dyes are shown to depend upon the surrounding material using narrowband laser excitation. We developed three independent techniques for measuring self-absorption rates; these are time-resolved emission, steady-state polarization anisotropy, and spectral convolution. Preliminary dye degradation and prototype efficiency measurements are included. Finally, we give simple relationships relating the efficiency and gain of an LSC to key spectroscopic parameters of its constituents.
Additional Information© 1981 Optical Society of America. Received 8 June 1981. A. H. Zewail is an Alfred P. Sloan Fellow and Camille and Henry Dreyfus Teacher-Scholar. Part of this work was supported by a contract from the U.S. Department of Energy and part by ARCO Solar, Inc. We thank R. J. Robbins and D. P. Millar for performing the transient lifetime measurements and for their stimulating discussions. We particularly thank R. J. Robbins for providing us with the anistropies for higher-order generations. We thank Stuart Vincent for help in casting plates and in the degradation experiments and Prakash Kasiraj for writing data handling and plotting software. We also thank Jim Liu, Bob Mueller, and co-workers at JPL for performing prototype measurements. J. S. Batchelder and A. H. Zewail also hold appointments in the Department of Applied Physics. This is Contribution 6455 from the Arthur Amos Noyes Laboratory of Chemical Physics, California Institute of Technology, Pasadena 91125.
Published - BATao81.pdf