Isomer-dependent performance of thin-film solar cells based on petroporphyrins

Luminescence of In(III)Cl-etioporphyrin-I

“…This is a record value among other metal complexes of etioporphyrin-I, indicating that the process of the population of the T 1 state in InCl-EtioP-I is very effective. Formation and relaxation pathways of the T 1 play are important to understand the photoresponse in active (solar cells) and passive (photodetectors) electronic devices employing small molecules as thin-film semiconductors or photosensitizers [12,13,30,31].…”

“…Generally, high value of ϕ ∆ , intensive phosphorescence at 77K and low value of ϕ F at 298 K suggest that after the absorption of a photon the InCl-EtioP-I complex with a high probability goes into the long-lived triplet T 1 -state, and the preferred way of its relaxation is the energy transfer to oxygen. Therefore, from the viewpoint of the photophysical properties of an individual molecule, InCl-EtioP-I is a suitable electron donor material for organic photovoltaics [13].…”

“…Recently, our group began studies on etio-type porphyrins, synthetic analogs of naturally occurring petroporphyrins-components of fossil fuels. They showed good stability during high vacuum sublimation [10] and high photoconductivity in thin sublimed films [11], which makes them promising candidates for device applications [12,13]. Among various transition metal complexes, a new complex of etioporphyrin-I with indium(III) chloride stands out with its unusual 2D-layered packing motif of molecules in a crystal [12].…”