Ammonium-iodide-salt additives induced photovoltaic performance enhancement in one-step solution process for perovskite solar cells

AbstractGrain boundaries in organic–inorganic halide perovskite solar cells (PSCs) have been found to be detrimental to the photovoltaic performance of devices. Here, we develop a unique approach to overcome this problem by modifying the edges of perovskite grain boundaries with flakes of high-mobility two-dimensional (2D) materials via a convenient solution process. A synergistic effect between the 2D flakes and perovskite grain boundaries is observed for the first time, which can significantly enhance the performance of PSCs. We find that the 2D flakes can conduct holes from the grain boundaries to the hole transport layers in PSCs, thereby making hole channels in the grain boundaries of the devices. Hence, 2D flakes with high carrier mobilities and short distances to grain boundaries can induce a more pronounced performance enhancement of the devices. This work presents a cost-effective strategy for improving the performance of PSCs by using high-mobility 2D materials.

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Highly efficient and stable low-temperature processed ZnO solar cells with triple cation perovskite absorber

Journal of Materials Chemistry A ◽

10.1039/c7ta03331a ◽

2017 ◽

Vol 5 (26) ◽

pp. 13439-13447 ◽

Cited By ~ 45

Author(s):

Jiaxing Song ◽

Leijing Liu ◽

Xiao-Feng Wang ◽

Gang Chen ◽

Wenjing Tian ◽

...

Keyword(s):

Solar Cells ◽

Low Temperature ◽

Photovoltaic Performance ◽

Perovskite Solar Cells ◽

Transport Layer ◽

Electron Transport Layer ◽

Deposition Method ◽

Highly Efficient ◽

Light Absorber ◽

One Step

Although ZnO is a compatible electron transport layer (ETL) for perovskite solar cells (PSCs), the fact that MAPbI3 easily undergoes thermal decomposition on a low-temperature processed ZnO surface limits the use of one-step deposition of perovskite and hence the resulting photovoltaic performance. The triple cation perovskite prepared with a one-step deposition method is demonstrated to be a stable light absorber in highly efficient PSCs with low-temperature processed ZnO as the ETL.

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Octamethyl-substituted Pd(ii) phthalocyanine with long carrier lifetime as a dopant-free hole selective material for performance enhancement of perovskite solar cells

Journal of Materials Chemistry A ◽

10.1039/c7ta07216c ◽

2017 ◽

Vol 5 (46) ◽

pp. 24416-24424 ◽

Cited By ~ 22

Author(s):

Xiaolu Zheng ◽

Yulong Wang ◽

Jiahua Hu ◽

Guang Yang ◽

Zhen Guo ◽

...

Keyword(s):

Solar Cells ◽

Carrier Lifetime ◽

Performance Enhancement ◽

Diffusion Length ◽

Photovoltaic Performance ◽

Perovskite Solar Cells ◽

Free Hole ◽

Phthalocyanine Derivative

Replacing copper with heavier palladium (Pd) endows the phthalocyanine derivative with a longer diffusion length and better photovoltaic performance.

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Mixed (5-AVA)xMA1−xPbI3−y(BF4)y perovskites enhance the photovoltaic performance of hole-conductor-free printable mesoscopic solar cells

Journal of Materials Chemistry A ◽

10.1039/c7ta09604f ◽

2018 ◽

Vol 6 (5) ◽

pp. 2360-2364 ◽

Cited By ~ 20

Author(s):

Yusong Sheng ◽

Anyi Mei ◽

Shuang Liu ◽

Miao Duan ◽

Pei Jiang ◽

...

Keyword(s):

Solar Cells ◽

Photovoltaic Performance ◽

Perovskite Solar Cells ◽

Solution Processing ◽

Processing Strategy ◽

Mixed Cation ◽

One Step

We report on a simple one-step solution processing strategy to fabricate new stable mixed cation/mixed halide (5-AVA)xMA1−xPbI3−y(BF4)y perovskite solar cells.

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The N, N-Dimethylformamide Annealing for Enhanced Performance of Perovskite Solar Cells Fabricated in Ambient Air

NANO ◽

10.1142/s1793292018501023 ◽

2018 ◽

Vol 13 (09) ◽

pp. 1850102

Author(s):

Xiude Yang ◽

Debei Liu ◽

Ping Li ◽

Bo Wu ◽

Haishen Huang ◽

...

Keyword(s):

Solar Cells ◽

Short Circuit ◽

Perovskite Solar Cells ◽

Solution Process ◽

Cost Effective ◽

Short Circuit Current ◽

Ambient Air ◽

Short Circuit Current Density ◽

Coating Method ◽

One Step

By adopting N, N-Dimethylformamide (DMF) atmosphere annealing at room temperature, planar perovskite solar cells with a p-i-n structure of ITO/PEDOT:PSS/Perovskite/PCBM/C[Formula: see text]/Al are fabricated by a simple one-step solution process in ambient air with humidity around 50%, and the influence of DMF atmosphere on perovskite solar cells (PSCs) is systematically investigated. Compared to the reference device without DMF reaction, the perovskite films treated by modest DMF annealing show a better distribution and a higher densification, and thus the power conversion efficiency (PCE), short circuit current density ([Formula: see text] and fill factor (FF) are increased by about 17%, 8% and 6%, respectively. This work displays the importance of solvent annealing for perovskite film prepared by the one-step spin-coating method, and possibly provides a simple and cost-effective way to efficiently fabricate PSCs in ambient air.

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