Sensing Application

Photo-assisted gas sensing at zero bias

Ag/Cu3(C18H6(NH)6)2/n-Si/Al Schottky diode with 20 nm EC-MOF · Electrode

Certified target gas mixed with dry air using mass-flow controllers; constant flow 600 mL min-1; 0 V bias; current recorded by Keithley 2602B; 450 nm PLS-SXE300C xenon lamp band-pass light source.

Atmosphere: dry air with target gas
Geometry: Ag/Cu3(C18H6(NH)6)2/n-Si/Al with window-like Ag film for gas diffusion
Context: application device with pristine EC-MOF interlayer
Measurement source: p004 / article p.9088 · Results and discussion; Experimental - Photo detection and gas sensing measurements · Fig. 4e-f

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
NH3 concentration range with linear log-log response	25-100 ppm NH3	—	—	Text Range	p004 / article p.9088 · Results and discussion · Fig. S15b cited in main
NH3 recovery time	7.5 min	450 s	—	Text Exact Reported	p004 / article p.9088 · Results and discussion · Fig. 4e
Repeatability coefficient of variation for NH3 sensing	as low as 3.4% in five continuous test cycles to 100 ppm NH3	0.034 fraction	—	Text Exact Reported	p004 / article p.9088 · Results and discussion · Fig. S15b cited in main
Response to 100 ppm NH3 under 450 nm light at 0 VMarked as a best value within this paper	13.5%	0.135 fractional response	—	Text Exact Reported	p004 / article p.9088 · Results and discussion · Fig. 4e
NH3 response time	2.4 min	144 s	—	Text Exact Reported	p004 / article p.9088 · Results and discussion · Fig. 4e
Response to acetone, figure-estimated	~5.5%	0.055 fractional response	visual estimate from Fig. 4f	Visual Estimate Uncertain	p003 / article p.9087 · Results and discussion · Fig. 4f
Response to benzene, figure-estimated	~1.6%	0.016 fractional response	visual estimate from Fig. 4f	Visual Estimate Uncertain	p003 / article p.9087 · Results and discussion · Fig. 4f
Response to carbon monoxide, figure-estimated	~4.5%	0.045 fractional response	visual estimate from Fig. 4f	Visual Estimate Uncertain	p003 / article p.9087 · Results and discussion · Fig. 4f
Response to ethanol, figure-estimated	~5.5%	0.055 fractional response	visual estimate from Fig. 4f	Visual Estimate Uncertain	p003 / article p.9087 · Results and discussion · Fig. 4f
Response to hydrogen, figure-estimated	~3.5%	0.035 fractional response	visual estimate from Fig. 4f	Visual Estimate Uncertain	p003 / article p.9087 · Results and discussion · Fig. 4f
Response to methane, figure-estimated	~2.5%	0.025 fractional response	visual estimate from Fig. 4f	Visual Estimate Uncertain	p003 / article p.9087 · Results and discussion · Fig. 4f

SI comparison table for self-powered photoconductor parameters

Ag/Cu3(C18H6(NH)6)2/n-Si/Al Schottky diode with 20 nm EC-MOF · Electrode

Table S1 compares reported self-powered photoconductor parameters; extracted only the first-hand Ag/MOF/Si row for this work.

Geometry: Ag/MOF/Si Schottky device
Context: application device with Cu3(C18H6(NH)6)2 interlayer
Measurement source: p014 · Table S1 · Table S1

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Table S1 this-work detectivity	3.2 x 10^11 Jones	—	—	SI Table Exact Reported	p014 · Table S1 · Table S1
Table S1 this-work EQEMarked as a best value within this paper	84%	—	—	SI Table Exact Reported	p014 · Table S1 · Table S1
Table S1 this-work on/off ratio	10^3	—	—	SI Table Approximate	p014 · Table S1 · Table S1
Table S1 this-work response rangeMarked as a best value within this paper	250-1500 nm	—	—	SI Table Range	p014 · Table S1 · Table S1
Table S1 this-work responsivity	300 mA W-1	—	—	SI Table Exact Reported	p014 · Table S1 · Table S1

2 measurement groups · 16 results