Table 3. Research progress of narrow-spectrum IR OPDs in recent years.

Device type	Hetero junction type	Active layer	Spectral response/FWHM (nm)	EQE (%)	D* (Jones)	R (A W−1)	J d (A cm−2)	LDR (dB)	Response speed	Year	Ref.
PD	PHJ	NT812/Y6	860/72	89	1.2 × 1013@−0.1 V	0.43	2 × 10−10	—	—	2020	130
PD	PHJ	DT-PDPP2T-TT/Y6	910/43	89	7.5 × 1012@−0.1 V	0.22	5 × 10−10	—	—	2020	130
PD	PHJ	DT-PDPP2TTT/IEICO-4F	940/66	89	1.6 × 1013@−0.1 V	0.24	1 × 10−10	—	—	2020	130
PD	BHJ	SQ-H:PC61BM	1040/59	12.30	4 × 1010@0 V	0.1	—	100	−3 dB	2021	131
									300 kHz
PT	BHJ	ZnPc :C60	843/33	450	1011@−5 V	—	—	—	t r 941 μs	2021	132
									t d 613 μs
PT	BHJ	P3HT:PC71BM	660/34	1120	6.4 × 1011@−10 V	6	—	150	t r 0.2 s	2021	133
									t d 0.6 s
PD	BHJ	PBTTT-OR-R:PC61BM	842/30	18	3.2 × 1011@0 V	—	2.3 × 10−6	—	—	2021	134
PD	BHJ	PCE10:COTIC-4F	1096/50	18	6.59 × 1012@0 V	—	—	100	−3 dB	2022	135
									24.4 kHz
PD	BHJ	PM6:Y6-FAMAPbI3	850/100	200	3 × 1013@0 V	1.5	2.0 × 10−10	150	t r 5.6 μs	2023	136
									t d 6.1 μs
PT	BHJ	P3HT:PC61BM	650/25	4.82 × 104	6.92 × 1014@−60 V	—	4.16 × 10−7	120	t r 70 ms	2024	137
									t d 106 ms
PD	BHJ	PBDBT:Y6	830/30	—	1.4 × 1010@0 V	0.12	2.73 × 10−7	55	t r 28 μs	2024	138
									t d 24 μs
PD	BHJ	ranDPP-2TBT:IEICO-4F	916/68	—	1011@−2 V	0.13	6.88 × 10−9	107	t r 9.5 μs	2025	139
									t d 11.1 μs