Silicon is generally, without modification in the chip such as deep trench isolation, not that sensitive to NIR. This means that in some cases alternative materials such as InGaAs or Ge are deployed. Organic semiconductors have now shown excellent results with 65% EQE at NIR. Silicon- even with modification- struggles to reach this level of performance.
Organic Photodetectors show 65% EQE at NIR (940nm)
Updated: Jan 5