Different roles of cadmium‐ and sulfur (selenium)‐terminated crystal facets in the formation of a photovoltaic response from hybrid organic/inorganic CdS (CdSe) heterojunctions

Abstract

Photovoltaic (PV) response of hybrid organic/inorganic bilayer heterostructures based on organic polymers or small molecules on the one hand, such as poly(3‐hexylthiophene), polyaniline doped with poly(styrenesulfonic acid), poly(ethylene‐3,4‐dioxythiophene) doped with poly(styrenesulfonic acid) (PEDOT:PSS), phthalocyanine, and inorganic CdS or CdSe single crystals on the other hand, has been studied depending on the crystal facet used. The effect of the surface‐terminated layer of the crystal on the PV performance of hybrid heterojunctions has been observed. It was found that the different crystal facets could render both quantitative and qualitative effect on PV properties of the hybrid heterojunctions. Photocurrent spectra of CdS/PEDOT:PSS heterojunctions based on the Cd‐terminated (solid curve) and S‐terminated (dashed curve) crystal facet.

Recent progress in organic–inorganic hybrid solar cells

“…The partial contribution was related to the specic interaction of the organic material with the surface atoms of the inorganic part. 141 Blending lms containing P3HT and in situ grown CdS display a greater yield of photogenerated charges than a blend containing an equivalent amount of pre-synthesized CdS QDs. 142 Metal sulde NP-polymer lms were fabricated based on the controlled in situ thermal decomposition of a metal xanthate precursor complex in a solidstate polymer lm.…”

Bulk heterojunction photovoltaic cells based on vacuum evaporated cadmium sulfide–phthalocyanine hybrid structures

“…The PcZn films deposited onto the PEDOT : PSS anode had a small thickness (∼20-40 nm) and did not guarantee a continuous covering of the PEDOT : PSS anode, and therefore some contact of the CdS overlayer and PEDOT : PSS through gaps in the PcZn film in the PEDOT : PSS/PcZn/CdS heterostructure is possible. Furthermore, it is known that the heterojunction of PEDOT : PSS and CdS single crystal is able to produce a PV response [26]. Therefore, the behaviour of the PEDOT : PSS/CdS heterojunction in the ITO/PEDOT : PSS/CdS/Al structure was evaluated first.…”

Photovoltaic effect in hybrid heterojunction formed from cadmium telluride and zinc perfluorophthalocyanine layers

“…Titanium dioxide (TiO 2 ) is most often used in such systems as an inorganic material, while polymers or phthalocyanines are applied as an organic material [1][2][3][4][5]. Intensive researches have been also conducted on bulk heterojunctions consisting of polymers and nanocrystals of other inorganic semiconductors such as CdS, CdSe, CuInS 2 , ZnO, PbS, PbSe, Si [6][7][8][9][10][11][12][13][14][15] and CdTe [16,17].…”