01165nas a2200121   4500008004100000245003300041210003200074260002600106300000800132520080900140100002100949856007300970       1990                        eng d00aPhotovoltaics: Coming of Age0 aPhotovoltaics Coming of Age  aOrlando, USAc05/1990  a1-83 aThe history of photovoltaic development is reviewed. An outline of the potential of the technology as the author views it is given. The challenge to be met to reach this potential is to develop high-efficiency technologies which can be produced at low cost. Three factors suggest this is possible. The first is the latent efficiency still to be recovered with even the most highly developed cell technologies. The second is the recent progress with tandem cells, which suggests that most of the 30-40% efficiency advantage over single-junction devices will eventually be realized. Tandem cells are likely to offer cost advantages in very high volume production. The third is the pyramid of possibilities, the wide range of semiconductors which still have to be evaluated for their photovoltaic potential.1 aGreen, Martin, A  uhttp://ieeexplore.ieee.org/lpdocs/epic03/wrapper.htm?arnumber=111582