产品照片：
This product contains MoSe2 monolayers on c-cut sapphire substrates. Please note that these MoSe2 monolayers do not reach full area coverage on sapphire or SiO2/Si samples. Sample size measures 1cm in size and the entire sample surface contains monolayer thick MoSe2 sheet. Synthesized monolayer MoSe2 is highly luminescent and Raman spectroscopy studies also confirm the monolayer thickness (please see the technical specifications), however few-layer regions are also anticipated to be observed.
Growth method: Our company synthesizes these monolayers using chemical vapor deposition (CVD) using highest purity (6N) gases and precursors in semiconductor grade facilities to produce crystalline and large domain size samples (1-50um). This is unlike commonly used MOCVD process wherein defects are very very large and domain sizes are small (10nm-500nm). Our samples are always highly luminescent and highly crystallized
Sample Properties
| Sample size | 1cm x 1cm square shaped |
| Substrate type | (0001) c-cut sapphire |
| Coverage | Does not reach full area coverage |
| Electrical properties | 1.58 eV Direct Bandgap Semiconductor |
| Crystal structure | Hexagonal Phase |
| Unit cell parameters | a = b = 0.327 nm, c = 1.295 nm, α = β = 90°, γ = 120° |
| Production method | Low pressure Chemical Vapor Deposition (LPCVD) |
| Characterization methods | Raman, photoluminescence, TEM, EDS |
Specifications
Identification. Full coverage 100% monolayer MoSe2 uniformly covered across c-cut sapphire
Physical dimensions. one centimeter in size. Larger sizes up to 2-inch wafer-scale available upon requests.
Smoothness. Atomically smooth surface with roughness < 0.15 nm.
Uniformity. Highly uniform surface morphology. MoSe2 monolayers uniformly cover across the sample.Purity. 99.9995% purity as determined by nano-SIMS measurements
Reliability. Repeatable Raman and photoluminescence response
Crystallinity. High crystalline quality, Raman response, and photoluminescence emission comparable to single crystalline monolayer flakes.Substrate. c-cut Sapphire but our research and development team can transfer MoSe2 monolayers onto variety of substrates including PET, quartz, and SiO2/Si without significant compromisation of material quality.
Support. 2Dsemiconductors USA is an American owned, regulated, and operated company. Our customers are well-protected by international as well as strict American customer laws and regulations. We give full technical support and guarantee your satisfaction with our well-established customer
Defect profile. MoSe2 monolayers do not contain significant amount of intentional dopants or defects. However, our technical staff can produce defected MoSe2 using a-bombardment technique.
