A new a-Si:H based three colour-detector with the assembly transparent
conducting oxide (TCO)/PINIP/TCO/PIN/metal is theoretically and exper
imentally investigated. This detector assembly overcomes the problems
with a thin PIN diode for the detection of the blue colour in the TCO/
PIN/TCO/PINIP/metal assembly. The theoretical results demonstrate the
advantages of the new detector type. The three colours could be detect
ed with full width half magnitude < 150 nm and colour suppressions of
more than three between each colour. Experimentally, the spectral resp
onses show the peak values at the demanded wavelengths, but exhibit an
asymmetrical behaviour leading to full width half magnitudes larger t
han the theoretical prediction. (C) 1998 Elsevier Science B.V. All rig
hts reserved.