Improved efficiency of perovskite solar cells based on Ni-doped ZnO nanorod arrays and Li salt-doped P3HT layer for charge collection

Abstract

We demonstrate regular-type perovskite solar cells based on vertically grown Nidoped ZnO nanorod arrays and doped P3HT for solar energy harvesting. PCBM was introduced between Ni-doped ZnO nanorod arrays and the perovskite layer to improve electron extraction, while P3HT doped with bis(trifluoromethane)sulfonimide lithium salt (Li-TFSI) was used as hole transporting layer. Three types of perovskite materials, including MAPbI 3 , (MA) x (FA) 1-x PbI 3 , and (MA) y (GA) 1-y PbI 3 , were used as light harvesting layers to exploit conversion efficiency of photovoltaic devices. The optimized perovskite solar cell with the configuration of ITO/Ni-doped ZnO nanorods/PCBM/(MA) y (GA) 1-y PbI 3 /P3HT + Li-TFSI/Au revealed an open-circuit voltage of 0.83 V, a short-circuit current density of 23.73 mA/cm 2 , a fill factor of 70%, and a power conversion efficiency of 13.79%.

Perovskite Solar Cells with ZnO Electron‐Transporting Materials

“…The PSC based on this modified ZnO nanorods yields a PCE of 16.1% . Similar results can be obtained by Mg, Go, Sn, In, and Ni doping.…”

Promising hole‐transporting materials for perovskite solar cells: Modulation of the electron‐deficient units in triphenylamine derivative‐based molecules

“…The frontier molecular orbitals comprise basic parameters to illustrate the electronic information and charge‐transport properties of the organic materials for PSCs. In PSC devices, the conventional architecture of ITO/ETL/perovskite/hole‐transporting layer (HTL)/Au is the most commonly used . As has been demonstrated, HTMs as the HTL play a key role in extracting holes to the Au electrode in conventional devices.…”

“…However, compared with the dominant silicon‐based solar cells on the current market, PSCs exhibit thermal and environmental instability that limit their large‐scale production and application . In general, PSC device architectures of indium tin oxide (ITO)/electron‐transporting layer (ETL)/perovskite (CH 3 NH 3 PbI 3 )/hole‐transporting layer (HTL)/Au are the most commonly used . As has been demonstrated, hole‐transporting materials (HTMs) as the HTL play a key role in extracting holes to Au electrodes for conventional devices.…”

Synthesis and characterization of transition metals doped CuO nanostructure and their application in hybrid bulk heterojunction solar cells

“…Metal oxide nanostructures such as ZnO, NiO, CuO, TiO 2 etc. with narrow and large band gap based p and n-type, have been widely investigated for their potential applications in various energy and environmental sectors [1][2][3][4][5][6][7][8]. Among these, copper oxide (CuO) has attended significant interest due to its exciting surface chemistry, excellent recyclability, non-toxicity, relatively high abundance, affordable cost and has been widely explored as an innovtaive material for solar cell and photovoltaics (PV) applications [9][10][11][12][13].…”