scholarly journals A Special Additive Enables All Cations and Anions Passivation for Stable Perovskite Solar Cells with Efficiency over 23%

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Wenjing Zhao ◽  
Jie Xu ◽  
Kun He ◽  
Yuan Cai ◽  
Yu Han ◽  
...  
Keyword(s):  
Solar Cells ◽  
Photovoltaic Performance ◽  
Perovskite Solar Cells ◽  
Film Deposition ◽  
Lewis Base ◽  
Light Illumination ◽  
Nonradiative Recombination ◽  
Ambient Conditions ◽  
Multifunctional Additive ◽  
Hole Transporting Material

AbstractPassivating undercoordinated ions is an effective way to reduce the defect densities at the surface and grain boundaries (GBs) of perovskite materials for enhanced photovoltaic performance and stability of perovskite solar cells (PSCs). Here, (BBF) complex is chosen as a multifunctional additive, which contains both C7H9N and BF3 groups working as Lewis base and Lewis acid, respectively, can bond with Pb2+/I− and FA+ on the surface and in the GBs in the perovskite film, affording passivation of both cation and anion defects. The synergistic effect of the C7H9N and BF3 complex slows the crystallization during the perovskite film deposition to improve the crystalline quality, which reduces the trap density and the recombination in the perovskite film to suppress nonradiative recombination loss and minimizes moisture permeation to improve the stability of the perovskite material. Meanwhile, such an additive improves the energy-level alignment between the valence band of the perovskite and the highest occupied molecular orbital of the hole-transporting material, Spiro-OMeTAD. Consequently, our work achieves power conversion efficiency of 23.24%, accompanied by enhanced stability under ambient conditions and light illumination and opens a new avenue for improving the performance of PSCs through the use of a multifunctional complex.

scholarly journals All-in-One Deposition to Synergistically Manipulate Perovskite Growth for High-Performance Solar Cell

Research ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Yifan Lv ◽  
Hui Zhang ◽  
Jinpei Wang ◽  
Libao Chen ◽  
Lifang Bian ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
High Performance ◽  
Photovoltaic Performance ◽  
Perovskite Solar Cells ◽  
Lewis Base ◽  
Nonradiative Recombination ◽  
Fabrication Procedure ◽  
Coordination Ability ◽  
Cost Efficient

Nonradiative recombination losses originating from crystallographic distortions and issues occurring upon interface formation are detrimental for the photovoltaic performance of perovskite solar cells. Herein, we incorporated a series of carbamide molecules (urea, biuret, or triuret) consisting of both Lewis base (–NH2) and Lewis acid (–C=O) groups into the perovskite precursor to simultaneously eliminate the bulk and interface defects. Depending on the different coordination ability with perovskite component, the incorporated molecules can either modify crystallization dynamics allowing for large crystal growth at low temperature (60°C), associate with antisite or undercoordinated ions for defect passivation, or accumulate at the surface as an energy cascade layer to enhance charge transfer, respectively. Synergistic benefits of the above functions can be obtained by rationally optimizing additive combinations in an all-in-one deposition method. As a result, a champion efficiency of 21.6% with prolonged operational stability was achieved in an inverted MAPbI3 perovskite solar cell by combining biuret and triuret additives. The simplified all-in-one fabrication procedure, adaptable to different types of perovskites in terms of pure MAPbI3, mixed perovskite, and all-inorganic perovskite, provides a cost-efficient and reproducible way to obtain high-performance inverted perovskite solar cells.

scholarly journals Comparative Performance Study of Perovskite Solar Cell for Different Electron Transport Materials

2018 ◽  
Vol 66 (2) ◽  
pp. 109-114
Author(s):  
Najmin Ara Sultana ◽  
Md Obidul Islam ◽  
Mainul Hossain ◽  
Zahid Hasan Mahmood
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Electron Transport ◽  
Photovoltaic Performance ◽  
Perovskite Solar Cells ◽  
Vital Role ◽  
Performance Study ◽  
High Power Conversion Efficiency ◽  
Comparative Performance ◽  
Hole Transporting Material

In recent times, planar organo-metal halide perovskite solar cells (PSCs) achieved high power conversion efficiency (PCE > 22%). Mixed organic-inorganic halide perovskites, with excellent light harvesting properties, have evolved as a promising class of semiconductors for photovoltaics. In this work, compositional and electrical characterizations of materials used for different layers of PSC have been studied. One dimensional solar cell simulator wx-AMPS is used for numerical simulation of such devices and all simulations are done under AM1.5 illuminations and 300K temperature. Investigating the influences of thickness of electron transport material (ETM), hole transporting material (HTM) and absorber on the photovoltaic performance of PSCs, it is observed that, increase in thickness of perovskite (MAPbI3) results in the increase in PCE of solar cells, whereas increase in thickness of ETM layer results in decrease in the efficiency of the devices. The ETM plays a vital role on the performance of PSC. In this paper, for the first time performances of PSC for three different ETMs (TiO2, ZnO or SnO2) are calculated and analyzed simultaneously with the simulator wx-AMPS. The photovoltaic performances have been explored and efficiencies of 27.6%, 27.5% and 28.02% are reported for perovskite solar cells with TiO2, ZnO and SnO2 as ETM respectively for a specific thickness. Finally, this simulation study concludes that ZnO and SnO2 may be effective alternatives of the commonly used material, TiO2 as they are economically more potential and give somewhat better photovoltaic performance. Dhaka Univ. J. Sci. 66(2): 109-114, 2018 (July)

scholarly journals Alkali Metal Cation Incorporated Ag3BiI6 Absorbers for Efficient and Stable Rudorffite Solar Cells

2021 ◽  
Author(s):  
Ming-Chung Wu ◽  
Ruei-Yu Kuo ◽  
Yin-Hsuan Chang ◽  
Shih-Hsuan Chen ◽  
Ching-Mei Ho​ ◽  
...  
Keyword(s):  
Solar Cells ◽  
Alkali Metal ◽  
Carrier Transport ◽  
Short Circuit ◽  
Alkali Metal Cation ◽  
Photovoltaic Performance ◽  
Perovskite Solar Cells ◽  
Short Circuit Current ◽  
Ambient Conditions ◽  
Kelvin Probe

Abstract Objectives Toxic lead and poor stability are the main obstacles of perovskite solar cells. Lead-free silver bismuth iodide (SBI) was first attempted as solar cells photovoltaic materials in 2016. However, the short-circuit current of the SBI rudorffite materials is commonly below 10 mA/cm2, limiting the overall photovoltaic performance. Here, we present a chemical composition engineering to enhance the photovoltaic performance. Methods In this study, we incorporated a series of alkali metal cations (Li+, Na+, K+, Rb+, and Cs+) into Ag3BiI6 absorbers to investigate the effects on the photovoltaic performance of rudorffite solar cells. Results Cs+ doping improved VOC and Na+ doping showed an obvious enhancement in JSC. Therefore, we co-doped Na+ and Cs+ into SBI (Na/Cs-SBI) as the absorber and investigated the crystal structure, surface morphology, and optical properties. The photo-assisted Kelvin probe force microscopy (photo-KPFM) was used to measure surface potential and verified that Na/Cs doping could reduce the electron trapping at the grain boundary and facilitate electron transportation. Conclusion Na/Cs-SBI reduced the electron-holes pairs recombination and promoted the carrier transport of rudorffite solar cells. Finally, the Na/Cs-SBI rudorffite solar cell exhibited a PCE of 2.50%, a 46.0% increase to the SBI device (PCE = 1.71%), and was stable in ambient conditions for over 6 months.

Acridine-based novel hole transporting material for high efficiency perovskite solar cells

2017 ◽  
Vol 5 (16) ◽  
pp. 7603-7611 ◽  
Author(s):  
An-Na Cho ◽  
Nallan Chakravarthi ◽  
Kakaraparthi Kranthiraja ◽  
Saripally Sudhaker Reddy ◽  
Hui-Seon Kim ◽  
...  
Keyword(s):  
Solar Cells ◽  
High Efficiency ◽  
Photovoltaic Performance ◽  
Perovskite Solar Cells ◽  
Cost Effective ◽  
Promising Alternative ◽  
Hole Transporting ◽  
Hole Transporting Material ◽  
The Cost

The cost-effective hole transporting material ACR-TPA based on a 9,9-dimethyl-9,10-dihydroacridine core is synthesized and found to be a promising alternative to spiro-MeOTAD because of its comparable photovoltaic performance.

scholarly journals Methylamine-assisted growth of uniaxial-oriented perovskite thin films with millimeter-sized grains

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Haochen Fan ◽  
Fengzhu Li ◽  
Pengcheng Wang ◽  
Zhenkun Gu ◽  
Jin-Hua Huang ◽  
...  
Keyword(s):  
Thin Films ◽  
Solar Cells ◽  
Intermediate Phase ◽  
Low Cost ◽  
Photovoltaic Performance ◽  
Perovskite Solar Cells ◽  
Environmental Stability ◽  
Nonradiative Recombination ◽  
Recombination Energy ◽  
Lead Iodide

Abstract Defects from grain interiors and boundaries of perovskite films cause significant nonradiative recombination energy loss, and thus perovskite films with controlled crystallinity and large grains is critical for improvement of both photovoltaic performance and stability for perovskite-based solar cells. Here, a methylamine (MA0) gas-assisted crystallization method is developed for fabrication of methylammonium lead iodide (MAPbI3) perovskite films. In the process, the perovskite film is formed via controlled release of MA0 gas molecules from a liquid intermediate phase MAPbI3·xMA0. The resulting perovskite film comprises millimeter-sized grains with (110)-uniaxial crystallographic orientation, exhibiting much low trap density, long carrier lifetime, and excellent environmental stability. The corresponding perovskite solar cell exhibits a power conversion efficiency (PCE) of ~ 21.36%, which is among the highest reported for MAPbI3-based devices. This method provides important progress towards the fabrication of high-quality perovskite thin films for low-cost, highly efficient and stable perovskite solar cells.

Efficient perovskite solar cells enabled by large dimensional structured hole transporting materials

2021 ◽  
Author(s):  
Tai Wu ◽  
Dongyang Zhang ◽  
Yangmei Ou ◽  
Huili Ma ◽  
Anxin Sun ◽  
...  
Keyword(s):  
Solar Cells ◽  
Photovoltaic Performance ◽  
Perovskite Solar Cells ◽  
Hole Transporting ◽  
Hole Transporting Material ◽  
Hole Transporting Materials

A large dimensional structured hole transporting material exhibits excellent photovoltaic performance in perovskite solar cells.

scholarly journals Perovskite-Polymer Blends Influencing Microstructures, Nonradiative Recombination Pathways, and Photovoltaic Performance of Perovskite Solar Cells

2018 ◽  
Vol 10 (49) ◽  
pp. 42542-42551 ◽  
Author(s):  
Azhar Fakharuddin ◽  
Michael Seybold ◽  
Antonio Agresti ◽  
Sara Pescetelli ◽  
Fabio Matteocci ◽  
...  
Keyword(s):  
Solar Cells ◽  
Polymer Blends ◽  
Photovoltaic Performance ◽  
Perovskite Solar Cells ◽  
Nonradiative Recombination

A [2,2]paracyclophane triarylamine-based hole-transporting material for high performance perovskite solar cells

2015 ◽  
Vol 3 (48) ◽  
pp. 24215-24220 ◽  
Author(s):  
Sungmin Park ◽  
Jin Hyuck Heo ◽  
Cheol Hong Cheon ◽  
Heesuk Kim ◽  
Sang Hyuk Im ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
High Performance ◽  
Photovoltaic Performance ◽  
Perovskite Solar Cells ◽  
Solar Cell Device ◽  
Charge Mobility ◽  
Hole Transporting ◽  
Hole Transporting Material

We report a new hole transporting material (HTM) based on [2,2]paracyclophane triarylamine. Due to its higher charge mobility compared with spiro-OMeTAD, the solar cell device incorporating the new HTM achieved a high photovoltaic performance with a PCE of 17.6%.

Inverted planar perovskite solar cells with dopant free hole transporting material: Lewis base-assisted passivation and reduced charge recombination

2017 ◽  
Vol 5 (25) ◽  
pp. 13220-13227 ◽  
Author(s):  
Sang Jin Park ◽  
Seolhee Jeon ◽  
In Kyu Lee ◽  
Jing Zhang ◽  
Huiseong Jeong ◽  
...  
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Charge Recombination ◽  
Lewis Base ◽  
Device Performance ◽  
Free Hole ◽  
Hole Transporting ◽  
Hole Transporting Material ◽  
Planar Heterojunction ◽  
Hole Transporting Materials

Triarylamine derivatives containing electron donating methoxy units provide outstanding device performance as dopant-free hole transporting materials in inverse type planar heterojunction perovskite solar cells.

Indolocarbazole based small molecules: an efficient hole transporting material for perovskite solar cells

RSC Advances ◽  
2015 ◽  
Vol 5 (68) ◽  
pp. 55321-55327 ◽  
Author(s):  
Iseul Lim ◽  
Eun-Kyung Kim ◽  
Supriya A. Patil ◽  
Do Young Ahn ◽  
Wonjoo Lee ◽  
...  
Keyword(s):  
Solar Cells ◽  
Small Molecules ◽  
Photovoltaic Performance ◽  
Perovskite Solar Cells ◽  
Extraction Ability ◽  
Hole Transporting ◽  
Hole Transporting Material

Compared to Spiro-OMeTAD, an improved photovoltaic performance of the C12-carbazole based device is obtained due to the better hole extraction ability of the C12-carbazole.

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