Thin-film formation of 2D MoS2 and its application as a hole-transport layer in planar perovskite solar cells

2017 ◽  
Vol 172 ◽  
pp. 353-360 ◽  
Author(s):  
Uttiya Dasgupta ◽  
Soumyo Chatterjee ◽  
Amlan J. Pal
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Film Formation ◽  
Perovskite Solar Cells ◽  
Hole Transport ◽  
Transport Layer ◽  
Hole Transport Layer ◽  
Thin Film Formation

scholarly journals Investigation of Inverted Perovskite Solar Cells for Viscosity of PEDOT:PSS Solution

Crystals ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 358 ◽  
Author(s):  
Pao-Hsun Huang ◽  
Yeong-Her Wang ◽  
Chien-Wu Huang ◽  
Wen-Ray Chen ◽  
Chien-Jung Huang
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Carrier Transport ◽  
Perovskite Solar Cells ◽  
Open Circuit ◽  
Hole Transport ◽  
Transport Layer ◽  
Hole Transport Layer ◽  
Considerable Impact ◽  
Stable Performance

In this paper, we demonstrate that the inverted CH3NH3PbI3 (perovskite) solar cells (PSCs) based on fullerene (C60) as an acceptor is fabricated by applying an improved poly(3,4-ethlyenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) solution as a hole transport layer (HTL). The power conversion efficiency (PCE) of inverted PSCs is increased by 37.5% with stable values of open-circuit voltage (VOC) and fill factor (FF) because we enhance the viscosity of the PEDOT:PSS solution, indicating the perfect effect on both external quantum efficiency (EQE) and surface grain size. The characteristics of the PEDOT:PSS solution, which is being improved through facile methods of obtaining excellent growth of PEDOT:PSS thin film, have a considerable impact on carrier transport. A series of further processing fabrications, including reliable and feasible heating and stirring techniques before the formation of the PEDOT:PSS thin film via spin-coating, not only evaporate the excess moisture but also obviously increase the conductivity. The raised collection of holes become the reason for the enhanced PCE of 3.0%—therefore, the stable performance of FF and VOC are attributed to lower series resistance of devices and the high-quality film crystallization of perovskite and organic acceptors, respectively.

scholarly journals Combustion Processed Nickel Oxide and Zinc Doped Nickel Oxide Thin Films as a Hole Transport Layer for Perovskite Solar Cells

Coatings ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 627
Author(s):  
Ponmudi Selvan Thiruchelvan ◽  
Chien-Chih Lai ◽  
Chih-Hung Tsai
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Solar Cells ◽  
Nickel Oxide ◽  
Perovskite Solar Cells ◽  
Combustion Process ◽  
Hole Transport ◽  
Transport Layer ◽  
Hole Transport Layer ◽  
X Ray

Combustion processed nickel oxide (NiOx) thin film is considered as an alternative to the sol-gel processed hole transport layer for perovskite solar cells (PSCs). In this paper, NiOx thin film was prepared by the solution–combustion process at 250 °C, a temperature lower than the actual reaction temperature. Furthermore, the properties of the NiOx hole transport layer (HTL) in PSCs were enhanced by the incorporation of zinc (Zn) in NiOx thin films. X-ray diffraction and X-ray photoelectron spectroscopy results revealed that the formation of NiOx was achieved at lower annealing temperature, which confirms the process of the combustion reaction. The electrical conductivity was greatly improved with Zn doping into the NiOx crystal lattice. Better photoluminescence (PL) quenching, and low PL lifetime decay were responsible for better charge separation in 5% Zn doped NiOx, which results in improved device performance of PSCs. The maximum power conversion efficiency of inverted PSCs made with pristine NiOx and 5% Zn-NiOx as the HTL was 13.62% and 14.87%, respectively. Both the devices exhibited better stability than the PEDOT:PSS (control) device in an ambient condition.

scholarly journals Solid-State Solar Cells Based on TiO2 Nanowires and CH3NH3PbI3 Perovskite

Coatings ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 404
Author(s):  
Abdul Sami ◽  
Arsalan Ansari ◽  
Muhammad Dawood Idrees ◽  
Muhammad Musharraf Alam ◽  
Junaid Imtiaz
Keyword(s):  
Solar Cells ◽  
Solid State ◽  
Light Trapping ◽  
Active Material ◽  
Perovskite Solar Cells ◽  
Hole Transport ◽  
Transport Layer ◽  
Electron Transport Layer ◽  
Hole Transport Layer ◽  
Tio2 Nanowires

Perovskite inorganic-organic solar cells are fabricated as a sandwich structure of mesostructured TiO2 as electron transport layer (ETL), CH3NH3PbI3 as active material layer (AML), and Spiro-OMeTAD as hole transport layer (HTL). The crystallinity, structural morphology, and thickness of TiO2 layer play a crucial role to improve the overall device performance. The randomly distributed one dimensional (1D) TiO2 nanowires (TNWs) provide excellent light trapping with open voids for active filling of visible light absorber compared to bulk TiO2. Solid-state photovoltaic devices based on randomly distributed TNWs and CH3NH3PbI3 are fabricated with high open circuit voltage Voc of 0.91 V, with conversion efficiency (CE) of 7.4%. Mott-Schottky analysis leads to very high built-in potential (Vbi) ranging from 0.89 to 0.96 V which indicate that there is no depletion layer voltage modulation in the perovskite solar cells fabricated with TNWs of different lengths. Moreover, finite-difference time-domain (FDTD) analysis revealed larger fraction of photo-generated charges due to light trapping and distribution due to field convergence via guided modes, and improved light trapping capability at the interface of TNWs/CH3NH3PbI3 compared to bulk TiO2.

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