A N I NTRODUCTION TO O RGANIC S OLAR C ELLS Alexander Parker.

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Presentation transcript:

A N I NTRODUCTION TO O RGANIC S OLAR C ELLS Alexander Parker

W HY D O W E N EED S OLAR ? Population (Billion) Source: Google Public Data Source: BP

W HY D O W E N EED S OLAR ?

T YPES O F S OLAR C ELL Inorganic devices: 24.7% Polymer devices: 8% Dye Sensitised devices: 11% Thin film organic devices: 9.8%

O RGANIC D EVICES : A H ISTORY Single layer (MIM): 0.5% Metal-Insulator-Semiconductor (MIS): 0.7% Bilayer: 0.95% (Tang) Tandem cell : 9.8 %

O RGANIC D EVICES : P RINCIPALS O F O PERATION Anode Electrode DonorAcceptor Cathode Electrode 1. Absorption of a photon 2. Formation of an exciton 3. Diffusion of the exciton 4. Dissociation of the exciton 5. Charge transport 6. Charge collection

O RGANIC D EVICES : A RCHITECTURE Bilayer Inverted Bulk Heterojunction

O RGANIC D EVICES : M ATERIALS Donors Copper pthalocyanine (CuPc) Boro Subthalocyanine Chloride (SubPc) Acceptors C 60 Extracting materials Bathocuproine (BCP) Molybdoenum Oxide (MoO x )

P ROJECT D IRECTIONS : T RANSITION M ETAL O XIDES Transition metal oxides widely used in organic devices. ITO electrode Zn extracting layer MoO x Aim to use Aluminium doped Zinc Oxide for several purposes Replace BCP Replace ITO