intermediate band solar cells based on i-iii-vi 2 compounds

Hahn-Meitner Institut Berlin

Intermediate band solar cells based on I-III-VI2 compounds

Project team

Dr. R. Scheer

Dr. Th. Unold

PhD

Lars Steinkopf (Technician)

Hahn-Meitner-Institut Berlin, Department Prof. Schock

Hahn-Meitner Institut Berlin

NeutronsNeutrons Photons Photons

thin films

Technologies

new concepts

Analytics

Solar energie researchPhotovoltaics + (Photo)elektrocatalysis Structur and dynamics of condensed matter

Structural research

Hahn-Meitner-Institut Berlin

Hahn-Meitner Institut Berlin

3.5

3.0

2.5

2.0

1.5

1.0

Ba

nd

Gap

[e

V]

5.85.75.65.55.45.3Lattice Parameter [Å]

CuInSe2

CuGaSe2

CuAlSe2

CuInS2

CuGaS2

CuAlS2

Cu(In,Ga,Al)(S,Se)2 solid solution system

0 %

10%

20%

30%

Efficiency

Hahn-Meitner Institut Berlin

Calculated efficiency limits

Hahn-Meitner Institut Berlin

Absorber Growth

CuS Ga

In

Simultaneous

Sequential

Metal

Metal

Hahn-Meitner Institut Berlin

SE3 Clustertool

• Sputtering

• Evaporation

• Reaction

• Real time analysis

• XRF analysis

Hahn-Meitner Institut Berlin

Cu(In,Ga)S2 : Metal

Molybdän

Substrat

ZnO

Buffer

Cell Design

Hahn-Meitner Institut Berlin

6 months plan

• Establishment of Cu(In,Ga)S2 baseline with Eg>1.8 eV by quasi-simultaneous deposition

• Selection of first transition element

• Material and device characterisation

• M2.1 First deposition test of thin film material with transition element