Interface Engineering And Characterization Of Organic-inorganic Hybrid Solar Cells

This paper mainly focuses on the interfacial properties optimization of hybridsilicon solar cells and polymer ones. The main contents of the research work are asfollows:1. AFORS-HET software was utilized to simulate the heterojunction solar cell,including operating temperature, semiconductor doping concentration, interface trapstate density and back surface field. Besides, after simplifying the model, the workfunction effect of Schottky solar cell based on n-type crystalline silicon was simulated.The conclusion was that when the work function of metal was5.4eV, this kind of solarcell can achieve the highest power conversion efficiency (PCE).2. For Schottky solar cell based on n-type crystalline silicon, conjugated polymerpoly(3,4-ethylenedioxythiophene) poly(styrenesulfonate)(PEDOT:PSS) was chosen toreplace metal. The work function of PEDOT:PSS was tuned by a simple method ofadding perfluoronated polymer in oder to change the built-in potential of the device.The results show that with an addition of4%(weight) perfluorinated ionomer (PFI) intoPEDOT:PSS, the device achieves a fll factor as high as0.70, which improves20%incomparison with the pristine PEDOT:PSS.3. A new interface material phosphomolybdic acid (PMA) was introduced in thepolymer solar cell based on thieno[3,4-b]thiophene/benzodithiophene (PTB7) andfullerene derivative (PC71BM) as the hole transporting layer. The PCEs of inverted andnormal device were8.32%and7.01%. Compared with the thermal evaporatedmolybdenum trioxide, PMA has better optical properties and the prepared device showed less charge recombination and better stability.