Short-wave infrared materials, detectors, and methods

A short-wave infrared detection system, comprising:

• at least one processor;
• an illumination source configured to illuminate a sampled location of an object or a scene;
• and
• a detector configured to detect light from the sampled location, the detector comprising:
• a conductive layer having a trech therein;
• a hole transport layer, at least a portion of the hole transport layer positioned within the trench of the conductive layer;
• and
• a light conversion layer disposed over the hole transport layer, the light conversion layer comprising a composition of formula (I):
• AaBbMcXd (I),
• wherein:
• A of formula (I) is an organic group or ion thereof;
• B of formula (I) is an organic group, an inorganic group, or ion thereof, B and A being the same or different;
• M of formula (I) is a metal or ion thereof;
• X of formula (I) is a halogen or ion thereof;
• and
• a, b, c, and d of formula (I) are numbers expressing amounts of A, B, M, and X.

A method, comprising:

• directing a light beam comprising short-wave infrared light from an illumination source towards an object and illuminating a sampled location on the object;
• and
• detecting, by a detector, light absorbed or reflected by the sampled location on the object, the detector comprising:
• a conductive layer having a trench therein;
• a hole transport layer, at least a portion of the hole transport layer positioned within the trench of the conductive layer;
• and
• a light conversion layer disposed over the hole transport layer, the light conversion layer having a thickness from about 200 nm to about 800 nm, the light conversion layer comprising a composition of formula (I):
• AaBbMcXd (I),
• wherein:
• A of formula (I) is an organic group or ion thereof;
• B of formula (I) is an organic group, an inorganic group, or ion thereof, B and A being the same or different;
• M of formula (I) is a metal or ion thereof;
• X of formula (I) is a halogen or ion thereof;
• and
• a, b, c, and d of formula (I) are numbers expressing amounts of A, B, M, and D.