Improving the efficiency and stability of inverted perovskite solar cells with dopamine-copolymerized PEDOT:PSS as a hole extraction layer

Carbon electrode-based planar PSCs demonstrated higher device performance and reduced hysteresis using a CuSCN based HTL owing to its favourable energy level alignment with the perovskite compared to conventional spiro-OMeTAD based HTL.

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Unraveling film transformations and device performance of planar perovskite solar cells

Nano Energy ◽

10.1016/j.nanoen.2015.01.025 ◽

2015 ◽

Vol 12 ◽

pp. 494-500 ◽

Cited By ~ 56

Author(s):

Tze-Bin Song ◽

Qi Chen ◽

Huanping Zhou ◽

Song Luo ◽

Yang (Michael) Yang ◽

...

Keyword(s):

Solar Cells ◽

Perovskite Solar Cells ◽

Device Performance

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The detrimental effect of excess mobile ions in planar CH3NH3PbI3 perovskite solar cells

Journal of Materials Chemistry A ◽

10.1039/c6ta05053k ◽

2016 ◽

Vol 4 (33) ◽

pp. 12748-12755 ◽

Cited By ~ 33

Author(s):

Yuanhang Cheng ◽

Ho-Wa Li ◽

Jian Qing ◽

Qing-Dan Yang ◽

Zhiqiang Guan ◽

...

Keyword(s):

Solar Cells ◽

Detrimental Effect ◽

Perovskite Solar Cells ◽

Device Performance ◽

Mobile Ions ◽

Device Operation

Mobile ions not only have detrimental effects on device performance but also trigger the degradation of perovskite during device operation.

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Slow surface passivation and crystal relaxation with additives to improve device performance and durability for tin-based perovskite solar cells

Energy & Environmental Science ◽

10.1039/c8ee00956b ◽

2018 ◽

Vol 11 (9) ◽

pp. 2353-2362 ◽

Cited By ~ 122

Author(s):

Efat Jokar ◽

Cheng-Hsun Chien ◽

Amir Fathi ◽

Mohammad Rameez ◽

Yu-Hao Chang ◽

...

Keyword(s):

Solar Cells ◽

Power Conversion Efficiency ◽

Conversion Efficiency ◽

Surface Passivation ◽

Power Conversion ◽

Perovskite Solar Cells ◽

Device Performance ◽

Slow Surface ◽

Effective Additive ◽

Improve Device

Ethylenediammonium diiodide (EDAI2) served as an effective additive for tin-based perovskite solar cells to attain a power conversion efficiency approaching 9%.

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Understanding the Impact of Cu-In-Ga-S Nanoparticles Compactness on Holes Transfer of Perovskite Solar Cells

Nanomaterials ◽

10.3390/nano9020286 ◽

2019 ◽

Vol 9 (2) ◽

pp. 286 ◽

Cited By ~ 3

Author(s):

Dandan Zhao ◽

Yinghui Wu ◽

Bao Tu ◽

Guichuan Xing ◽

Haifeng Li ◽

...

Keyword(s):

Grain Size ◽

Solar Cells ◽

Perovskite Solar Cells ◽

Transport Layer ◽

Device Performance ◽

Device Structure ◽

Optimal Point ◽

Hole Transfer ◽

Coverage Ratio ◽

The Impact

Although a compact holes-transport-layer (HTL) film has always been deemed mandatory for perovskite solar cells (PSCs), the impact their compactness on the device performance has rarely been studied in detail. In this work, based on a device structure of FTO/CIGS/perovskite/PCBM/ZrAcac/Ag, that effect was systematically investigated with respect to device performance along with photo-physics characterization tools. Depending on spin-coating speed, the grain size and coverage ratio of those CIGS films on FTO substrates can be tuned, and this can result in different hole transfer efficiencies at the anode interface. At a speed of 4000 r.p.m., the band level offset between the perovskite and CIGS modified FTO was reduced to a minimum of 0.02 eV, leading to the best device performance, with conversion efficiency of 15.16% and open-circuit voltage of 1.04 V, along with the suppression of hysteresis. We believe that the balance of grain size and coverage ratio of CIGS interlayers can be tuned to an optimal point in the competition between carrier transport and recombination at the interface based on the proposed mechanism. This paper definitely deepens our understanding of the hole transfer mechanism at the interface of PSC devices, and facilitates future design of high-performance devices.

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