Fabrication and Characterization of an Efficient Inverted Perovskite Solar Cells with POSS Passivating Hole Transport Layer

Polyhedral oligomeric silsesquioxane (POSS), featuring a hollow-cage or semi-cage structure is a new type of organic–inorganic hybrid nanoparticles. POSS combines the advantages of inorganic components and organic components with a great potential for optoelectronic applications such as in emerging perovskite solar cells. When POSS is well dispersed in the polymer matrix, it can effectively improve the thermal, mechanical, magnetic, acoustic, and surface properties of the polymer. In this study, POSS was spin-coated as an ultra-thin passivation layer over the hole transporting layer of nickel-oxide (NOx) in the structure of a perovskite solar cell. The POSS incorporation led to a more hydrophobic and smoother surface for further perovskite deposition, resulting in the increase in the grain size of perovskite. An appropriate POSS passivation layer could effectively reduce the recombination of the electron and hole at grain boundaries and increase the short-circuit current from 18.0 to 20.5 mA·cm−2. Moreover, the open-circuit voltage of the cell could slightly increase over 1 V.

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Optical Simulation and Investigation of the Effect of Hysteresis on the Perovskite Solar Cells

NANO ◽

10.1142/s1793292019501273 ◽

2019 ◽

Vol 14 (10) ◽

pp. 1950127 ◽

Cited By ~ 4

Author(s):

Farhad Jahantigh ◽

S. M. Bagher Ghorashi

Keyword(s):

Grain Size ◽

Solar Cells ◽

Open Circuit Voltage ◽

Short Circuit ◽

Perovskite Solar Cells ◽

Short Circuit Current ◽

Open Circuit ◽

Hole Transport ◽

Transport Layer ◽

Hole Transport Layer

Perovskite solar cells have recently been considered to be an auspicious candidate for the advancement of future photovoltaic research. A power conversion efficiency (PCE) as high as 22% has been reported to be reached, which can be obtained through an inexpensive and high-throughput solution process. Modeling and simulation of these cells can provide deep insights into their fundamental mechanism of performance. In this paper, two different perovskite solar cells are designed by using COMSOL Multiphysics to optimize the thickness of each layer and the overall thickness of the cell. Electric potential, electron and hole concentrations, generation rate, open-circuit voltage, short-circuit current and the output power were calculated. Finally, PCEs of 20.7% and 26.1% were predicted. Afterwards, according to the simulation results, the role of the hole transport layer (HTL) was investigated and the optimum thickness of the perovskite was measured to be 200[Formula: see text]nm for both cells. Therefore, the spin coating settings are selected so that a coating with this thickness for cell 1 is deposited. In order to compare the performance of HTM layer, solar cells with a Spiro-OMeTAD HTM and without the HTM layer in their structure were fabricated. According to the obtained photovoltaic properties, the solar cell made with Spiro-OMeTAD has a more favorable open-circuit voltage ([Formula: see text]), short-circuit current density ([Formula: see text]), fill factor (FF) and PCE compared to the cell without the HTM layer. Also, hysteresis depends strongly on the perovskite grain size, because large average grain size will lead to an increase in the grain’s contact surface area and a decrease in the density of grain boundaries. Finally, according to the results, it was concluded that, in the presence of a hole transport layer, ion transfer was better and ion accumulation was less intense, and therefore, the hysteresis decreases.

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Analysis of the role of hole transport layer materials to the performance of perovskite solar cell

E3S Web of Conferences ◽

10.1051/e3sconf/20186701021 ◽

2018 ◽

Vol 67 ◽

pp. 01021 ◽

Cited By ~ 2

Author(s):

Istighfari Dzikri ◽

Michael Hariadi ◽

Retno Wigajatri Purnamaningsih ◽

Nji Raden Poespawati

Keyword(s):

Solar Cells ◽

Solar Cell ◽

Short Circuit ◽

Perovskite Solar Cells ◽

Perovskite Solar Cell ◽

Open Circuit ◽

Hole Transport ◽

Transport Layer ◽

Hole Transport Layer

Research in solar cells is needed to maximize Indonesia’s vast solar potential that can reach up to 207.898 MW with an average radiation of 4.8 kWh/m2/day. Organometallic perovskite solar cells (PSCs) have gained immense attention due to their rapid increase in efficiency and compatibility with low-cost fabrication methods. Understanding the role of hole transport layer is very important to obtain highly efficient PSCs. In this work, we studied the effect of Hole Transport Layer (HTL) to the performance of perovskite solar cell. The devices with HTL exhibit substantial increase in power conversion efficiency, open circuit voltage and short circuit current compared to the device without HTL. The best performing device is PSC with CuSCN as HTL layer, namely Voc of 0.24, Isc of 1.79 mA, 0.27 FF and efficiency of 0.09%.

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Facile NiOx Sol-Gel Synthesis Depending on Chain Length of Various Solvents without Catalyst for Efficient Hole Charge Transfer in Perovskite Solar Cells

Polymers ◽

10.3390/polym10111227 ◽

2018 ◽

Vol 10 (11) ◽

pp. 1227 ◽

Cited By ~ 7

Author(s):

Byung Kim ◽

Woongsik Jang ◽

Dong Wang

Keyword(s):

Solar Cells ◽

Chain Length ◽

Short Circuit ◽

Sol Gel ◽

Perovskite Solar Cells ◽

Open Circuit ◽

Hole Transport ◽

Transport Layer ◽

Hole Transport Layer ◽

Perovskite Layer

Nickel oxide (NiOx)–based perovskite solar cells (PSCs) have recently gained considerable interest, and exhibit above 20% photovoltaic efficiency. However, the reported syntheses of NiOx sol-gel used toxic chemicals for the catalysts during synthesis, which resulted in a high-temperature annealing requirement to remove the organic catalysts (ligands). Herein, we report a facile “NiOx sol-gel depending on the chain length of various solvents” method that eschews toxic catalysts, to confirm the effect of different types of organic solvents on NiOx synthesis. The optimized conditions of the method resulted in better morphology and an increase in the crystallinity of the perovskite layer. Furthermore, the use of the optimized organic solvent improved the absorbance of the photoactive layer in the PSC device. To compare the electrical properties, a PSC was prepared with a p-i-n structure, and the optimized divalent alcohol-based NiOx as the hole transport layer. This improved the charge transport compared with that for the typical 1,2-ethanediol (ethylene glycol) used in earlier studies. Finally, the optimized solvent-based NiOx enhanced device performance by increasing the short-circuit current density (Jsc), open-circuit voltage (Voc), and fill factor (FF), compared with those of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)–based devices.

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Device Modeling and Design of Inverted Solar Cell Based on Comparative Experimental Analysis between Effect of Organic and Inorganic Hole Transport Layer on Morphology and Photo-Physical Property of Perovskite Thin Film

Materials ◽

10.3390/ma14092191 ◽

2021 ◽

Vol 14 (9) ◽

pp. 2191

Author(s):

Xiaolan Wang ◽

Xiaoping Zou ◽

Jialin Zhu ◽

Chunqian Zhang ◽

Jin Cheng ◽

...

Keyword(s):

Light Absorption ◽

Short Circuit ◽

Perovskite Solar Cells ◽

Open Circuit ◽

Hole Transport ◽

Transport Layer ◽

Hole Transport Layer ◽

Functional Layer ◽

Perovskite Layer ◽

The Impact

It is crucial to find a good material as a hole transport layer (HTL) to improve the performance of perovskite solar cells (PSCs), devices with an inverted structure. Polyethylene dioxythiophene-poly (styrene sulfonate) (PEDOT:PSS) and inorganic nickel oxide (NiOx) have become hotspots in the study of hole transport materials in PSCs on account of their excellent properties. In our research, NiOx and PEDOT: PSS, two kinds of hole transport materials, were prepared and compared to study the impact of the bottom layer on the light absorption and morphology of perovskite layer. By the way, some experimental parameters are simulated by wx Analysis of Microelectronic and Photonic Structures (wxAMPS). In addition, thin interfacial layers with deep capture levels and high capture cross sections were inserted to simulate the degradation of the interface between light absorption layer and PEDOT:PSS. This work realizes the combination of experiment and simulation. Exploring the mechanism of the influence of functional layer parameters plays a vital part in the performance of devices by establishing the system design. It can be found that the perovskite film growing on NiOx has a stronger light absorption capacity, which makes the best open-circuit voltage of 0.98 V, short-circuit current density of 24.55 mA/cm2, and power conversion efficiency of 20.01%.

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The Performance Improvement of Using Hole Transport Layer with Lithium and Cobalt for Inverted Planar Perovskite Solar Cell

Coatings ◽

10.3390/coatings10040354 ◽

2020 ◽

Vol 10 (4) ◽

pp. 354

Author(s):

Shaoxi Wang ◽

He Guan ◽

Yue Yin ◽

Chunfu Zhang

Keyword(s):

Solar Cells ◽

Short Circuit ◽

Perovskite Solar Cells ◽

Hole Mobility ◽

Short Circuit Current ◽

Short Circuit Current Density ◽

Hole Transport ◽

Transport Layer ◽

Hole Transport Layer ◽

Planar Heterojunction

With the continuous development of solar cells, the perovskite solar cells (PSCs), whose hole transport layer plays a vital part in collection of photogenerated carriers, have been studied by many researchers. Interface transport layers are important for efficiency and stability enhancement. In this paper, we demonstrated that lithium (Li) and cobalt (Co) codoped in the novel inorganic hole transport layer named NiOx, which were deposited onto ITO substrates via solution methods at room temperature, can greatly enhance performance based on inverted structures of planar heterojunction PSCs. Compared to the pristine NiOx films, doping a certain amount of Li and Co can increase optical transparency, work function, electrical conductivity and hole mobility of NiOx film. Furthermore, experimental results certified that coating CH3NH3PbIxCl3−x perovskite films on Li and Co- NiOx electrode interlayer film can improve chemical stability and absorbing ability of sunlight than the pristine NiOx. Consequently, the power conversion efficiency (PCE) of PSCs has a great improvement from 14.1% to 18.7% when codoped with 10% Li and 5% Co in NiOx. Moreover, the short-circuit current density (Jsc) was increased from 20.09 mA/cm2 to 21.7 mA/cm2 and the fill factor (FF) was enhanced from 0.70 to 0.75 for the PSCs. The experiment results demonstrated that the Li and Co codoped NiOx can be a effective dopant to improve the performance of the PSCs.

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p-Doping of organic hole transport layers in p–i–n perovskite solar cells: correlating open-circuit voltage and photoluminescence quenching

Journal of Materials Chemistry A ◽

10.1039/c9ta03896e ◽

2019 ◽

Vol 7 (32) ◽

pp. 18971-18979 ◽

Cited By ~ 11

Author(s):

Tian Du ◽

Weidong Xu ◽

Matyas Daboczi ◽

Jinhyun Kim ◽

Shengda Xu ◽

...

Keyword(s):

Solar Cells ◽

Open Circuit Voltage ◽

Perovskite Solar Cells ◽

Open Circuit ◽

Hole Transport ◽

Transport Layer ◽

Hole Transport Layer ◽

Photoluminescence Quenching ◽

Hole Transport Layers

Reduction in p-doping of the organic hole transport layer (HTL) leads to substantial improvements in PV performance in planar p–i–n perovskite solar cells.

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

Crystals ◽

10.3390/cryst8090358 ◽

2018 ◽

Vol 8 (9) ◽

pp. 358 ◽

Cited By ~ 3

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.

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