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CuS

Material: CuS

2元微信红包小扫雷群earth abundance [1]: good crystals are extremely rare

Basic Info

  • Occurs in nature as the mineral Covellite [1]
  • Usually as indigo-blue massive metallic material [1]
  • Discovered in 1832 [1]
  • Found in copper deposits [1]
  • Named after the Italian mineralogist, N. Covelli (1790-1829) [2]
  • Molecular Weight = 95.61 gm [2]

 

Physical Properties [1]:

sub-metallic

diaphaneity (transparency):

opaque

color:

indigo-blue or darker, inclining towards blue-black, often iridescent with purplish, deep red, and brassy-yellow reflections.

streak:

2元微信红包小扫雷群shiny metallic, lead-grey to black

hardness (mohs):

1½ - 2

hardness (vickers):

VHN100=128 - 138 kg/mm2

2元微信红包小扫雷群hardness data:

measured

tenacity:

flexible

cleavage:

Perfect
2元微信红包小扫雷群 Perfect on {0001}.

fracture:

2元微信红包小扫雷群irregular/uneven, hackly

2元微信红包小扫雷群density (measured):

4.6 - 4.76 g/cm3

2元微信红包小扫雷群density (calculated):

4.602 g/cm3

 

calculated properties [2]:

2元微信红包小扫雷群 electron density:

Bulk Density (Electron Density)=4.41 gm/cc
2元微信红包小扫雷群 note: Specific Gravity of Covellite =4.68 gm/cc.

fermion index:

Fermion Index = 0.0025153223
Boson Index = 0.9974846777

photoelectric:

PECovellite = 31.55 barns/electron

 

 

Crystal Structure [1]:

crystal system:

hexagonal

class (h-m):

6/mmm (6/2/2/m) - Dihexagonal Dipyramidal

space group:

P63/mmc {P63/2/2/c}

2元微信红包小扫雷群cell parameters:

a = 3.7938å, c = 16.341å

ratio:

2元微信红包小扫雷群a:c = 1 : 4.307

2元微信红包小扫雷群unit cell volume:

v 203.7 å³

z:

6

2元微信红包小扫雷群morphology:

2元微信红包小扫雷群hexagonal plates {001}, with pyramidal faces striated horizontally and hexagonal striations on the base. common forms: {001}, {104}, {103}, {308}, {102}, {9/0/16}, {5.08}, {101} and {201}. less common to rare: {1.0.16}, {1.0.12}, {3.0.32}, {108}, {106}, {3.0.16}, {105}, {205}, {203}, {304}, {15.0.16} and {908}.

twinning:

none reported.

 

x-ray powder diffraction data [1]:

d-spacing

 

intensity

3.22

 

(30)

3.05

 

(70)

2.81

 

(100)

2.72

 

(60)

2.32

 

(10)

1.90

 

(80)

1.74

 

(40)

1.57

 

(20)

1.56

 

(40)

 

PV Applications:

cus thin films are deposited by a chemical bath on top of other thin films such as sb2s3 [3] and sns [4]. then the films are heat treated with nitrogen and used as an absorber layer [3].

layer structures were: cus, sns, cds, sno2 [4] and sb2s2-cus, sb2s3, cds, tco [3]

 

 

Band structure and carrier concentration

2元微信红包小扫雷群band gap [5]: 1.55 ev

Carrier Concentration [6]: +2.5×1021 cm-3

        temperature dependences

a graph showing density of states for cus vs (e-ef) (ryd) can be found at reference 7.

 

Electrical Properties

Conductivity [6]: 2×103 S cm-1

DC resistance [8]: 7.5 × 103 Ω

2元微信红包小扫雷群resistivity [8]: 2.67 ω cm

basic parameters of electrical properties

Electrical conductivity of CuS thin film [5]: 3.6 x 103 Ω-1 cm-1

 

The Hall mobility [6]: 7.24cm2 V-1 s-1 

 

Optical properties [1] :

type:

2元微信红包小扫雷群uniaxial (+)

ri values:

nω = 1.450 nε = 2.620

maximum

δ = 1.170

2元微信红包小扫雷群surface relief:

very high

type:

2元微信红包小扫雷群anisotropic

2元微信红包小扫雷群anisotropism:

strong

dispersion:

strong

pleochroism:

visible

comments:

2元微信红包小扫雷群deep blue to blue-white

 

thermal properties

Mechanical properties [8]

        

2元微信红包小扫雷群scratch resistance [8]: 3 mn

 

References:

2元微信红包小扫雷群[1] j. ralph, i. chau, mindat available at: < (2012).

2元微信红包小扫雷群[2] webmineral, “covellite mineral data”,

 [3]

[4]

[5]

[6]

[7]

[8]

 

The development of these pages on photovoltaic materials’ properties was carried out at the University of Utah primarily by undergraduate students Jeff Provost and Carina Hahn working with Prof. Mike Scarpulla. Caitlin Arndt, Christian Robert, Katie Furse, Jash Sayani, and Liz Lund also contributed. The work was fully supported by the US National Science Foundation under the Materials World Network program award 1008302. These pages are a work in progress and we solicit input from knowledgeable parties around the world for more accurate or additional information. Contact [email protected] with such suggestions. Neither the University of Utah nor the NSF guarantee the accuracy of these values.