Electrical Transport — Electrical semiconduction modulated by light in a cobalt and naphthalene diimide metal-organic framework

4 measurement groups · 11 results

Reported values remain attached to the sample, method, conditions, extraction quality and source location that produced them.

Current-voltage curves in air using Keithley 2400 two-point probe arrangement

Electrical conductivity

MOF-CoNDI-py-2 single-crystal four-pad device · Electrode

Two spring-loaded probes; dark current curves for every pair of pads in Supplementary Fig. 6.

Temperature: ambient/not specified
Atmosphere: air
Geometry: two-point probes on four-pad single-crystal device
Context: pristine MOF in device
Measurement source: 5-6 · Discussion; Methods - Electrical characterisation · Supplementary Fig. 6

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Electrical conduction directions	crystal conducts electricity in all measured four-pad directions	—	—	Text Qualitative	6 · Discussion · Supplementary Fig. 6
Dark I-V asymmetry	asymmetric characteristics for MOF crystal with Pt contacts	—	—	Text Qualitative	5 · Discussion · Supplementary Fig. 6

Photoconductivity Jph under monochromatic light using Bentham PVE300 xenon quartz halogen lamps

MOF-CoNDI-py-2 single-crystal four-pad device · Electrode

Wavelengths 350, 380, 460, 510, 550, 630, 700 and 800 nm; voltage sweep -20 to +20 V; 25 +/- 0.5 deg C; four-wire Keithley 2400; lamp outputs in SI Table 4.

Temperature: 298.15 +/- 0.5
Atmosphere: dark box; ambient atmosphere not otherwise specified
Geometry: four-wire configuration; pad pairs b1-b2, b1-t1, b1-t2, t1-b2, t1-t2, t2-b2
Context: pristine MOF in device
Measurement source: 3-6 · Photoelectrical characterisation; Methods - Photoconductivity measurements · Fig. 8; Supplementary Fig. 7

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Approximate peak Jph at +20 V for b1-b2	approximately 3.3 uA mm^-2 near 510 nm	—	visual estimate from axis	Figure Axis Approximate	5 · Fig. 8 · Fig. 8a
Approximate peak Jph at +20 V for b1-t1	approximately 3.3 uA mm^-2 near 460 nm	—	visual estimate from axis	Figure Axis Approximate	5 · Fig. 8 · Fig. 8b
Lamp output intensity at 510 nm	49 pW mm^-2	—	—	SI Table Exact Reported	23 · Supplementary Table 4 · Supplementary Table 4
Lamp output intensity at 800 nm	7 pW mm^-2	—	—	SI Table Exact Reported	23 · Supplementary Table 4 · Supplementary Table 4

Responsivity calculated from illuminated and dark current, lamp intensity, crystal area and spot size

MOF-CoNDI-py-2 single-crystal four-pad device · Electrode

Same monochromatic photoconductivity device; responsivity = (Iit - Id)/(W x Ac/As) as Eq. 1.

Temperature: 298.15 +/- 0.5
Atmosphere: dark box; ambient atmosphere not otherwise specified
Geometry: single-crystal four-pad device
Context: pristine MOF in device
Measurement source: 5-6 · Discussion; Methods - Photoconductivity measurements · Fig. 7; Supplementary Fig. 8

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Maximum reported responsivityMarked as a best value within this paper	2.5 x 10^5 A W^-1 (t2-b2 at 800 nm, 20 V)	—	—	Text Rounded Reported	5 · Discussion · Fig. 8; Supplementary Fig. 8
Responsivity at 510 nm for b1-b2 at +20 V	approximately 0.68 x 10^5 A W^-1	—	visual estimate from axis	Figure Axis Approximate	4 · Fig. 7 · Fig. 7
Responsivity at 510 nm for t2-b2 at -20 V	approximately 1.05 x 10^5 A W^-1	—	visual estimate from axis	Figure Axis Approximate	4 · Fig. 7 · Fig. 7

Photocurrent versus modulated white-light illumination intensity

Photoresponse and photoelectrochemistry

MOF-CoNDI-py-2 single-crystal four-pad device · Electrode

White-light intensity varied 20-100 mW cm^-2; Jph at +20 V and -20 V for every pad pair.

Temperature: 298.15 +/- 0.5
Atmosphere: dark box; ambient atmosphere not otherwise specified
Geometry: single-crystal four-pad device
Context: pristine MOF in device
Measurement source: 5 · Discussion · Supplementary Figs. 9 and 10

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Bulk electric field for +/-20 V white-light measurement	less than 0.1 V um^-1	—	less than	Text Range	5 · Discussion · Supplementary Figs. 9 and 10
White-light photocurrent intensity dependence	linear response over 20-100 mW cm^-2 at +/-20 V	—	range	Text Range	5 · Discussion · Supplementary Figs. 9 and 10