What type of photodiode is this type?

[daisizhou]

The real object is the same as the picture,The working wavelength is 660nm/890-950nm

If you know the exact model, please let me know. Thank you for your help

[CosteC]

Photo is not great, but for me it looks more like photovoltaic cell, single one. Calculators have often 4 in series and you can see sections. Technically this is photodiode too - super large and slow. Filter on top may shift peak response wavelength. I am guessing only.

[abdulbadii]

Any device info ?

[Kim Christensen]

Can you post a picture of the thing this is supposed to be sensing?
Is it some sort of slotted wheel, and where exactly it is positioned relative to the sensors on the PCB?

[daisizhou]

It is a sensor inside the SPO2 analyzer

[daisizhou]

This is its user manual
https://wetransfer.com/downloads/0fc1e683ddd4e9babf465fff50543aa320230322004753/15c2f0356def3403d8e07761ef0cad7220230322004811/16f587

[james_s]

It looks like a bare die, a silicon solar cell and a photodiode are pretty much the same thing. It's very possible that it's a custom part, is yours defective?

[daisizhou]

I would like to know the exact model, but the appearance is not marked

[james_s]

Well if it is a custom part then the exact model will be relevant only to the OEM. If it's not marked it will be extremely difficult to determine that for sure.

[daisizhou]

I checked my back just now, but unfortunately there was no sign,There is no model mark