A hydrophobic hole transporting oligothiophene for planar perovskite solar cells with improved stability

2014 ◽  
Vol 50 (76) ◽  
pp. 11196-11199 ◽  
Author(s):  
Lingling Zheng ◽  
Yao-Hsien Chung ◽  
Yingzhuang Ma ◽  
Lipei Zhang ◽  
Lixin Xiao ◽  
...  
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Device Stability ◽  
Hole Transporting ◽  
Improved Stability

An oligothiophene derivative with high hydrophobicity was synthesized and functioned as HTM for perovskite solar cells without an ion additive, resulting in improved device stability than that observed when using Li-TFSI doped spiro-MeOTAD.

scholarly journals Improving Electron Extraction Ability and Device Stability of Perovskite Solar Cells Using a Compatible PCBM/AZO Electron Transporting Bilayer

Nanomaterials ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 720 ◽  
Author(s):  
Hang Dong ◽  
Shangzheng Pang ◽  
Yi Zhang ◽  
Dazheng Chen ◽  
Weidong Zhu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Metal Electrode ◽  
Extraction Ability ◽  
Time Resolved ◽  
Recombination Lifetime ◽  
Transient Photovoltage ◽  
Device Stability ◽  
Hole Transporting ◽  
Electron Extraction

Due to the low temperature fabrication process and reduced hysteresis effect, inverted p-i-n structured perovskite solar cells (PSCs) with the PEDOT:PSS as the hole transporting layer and PCBM as the electron transporting layer have attracted considerable attention. However, the energy barrier at the interface between the PCBM layer and the metal electrode, which is due to an energy level mismatch, limits the electron extraction ability. In this work, an inorganic aluminum-doped zinc oxide (AZO) interlayer is inserted between the PCBM layer and the metal electrode so that electrons can be collected efficiently by the electrode. It is shown that with the help of the PCBM/AZO bilayer, the power conversion efficiency of PSCs is significantly improved, with negligible hysteresis and improved device stability. The UPS measurement shows that the AZO interlayer can effectively decrease the energy offset between PCBM and the metal electrode. The steady state photoluminescence, time-resolved photoluminescence, transient photocurrent, and transient photovoltage measurements show that the PSCs with the AZO interlayer have a longer radiative carrier recombination lifetime and more efficient charge extraction efficiency. Moreover, the introduction of the AZO interlayer could protect the underlying perovskite, and thus, greatly improve device stability.

Hole transporting material with passivating group (C N) for perovskite solar cells with improved stability

2021 ◽  
Vol 187 ◽  
pp. 109129
Author(s):  
Zi'an Zhou ◽  
Xianfu Zhang ◽  
Yongpeng Liang ◽  
Rahim Ghadari ◽  
Cheng Liu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Hole Transporting ◽  
Improved Stability ◽  
Hole Transporting Material

scholarly journals Efficiency vs. stability: dopant-free hole transporting materials towards stabilized perovskite solar cells

2019 ◽  
Vol 10 (28) ◽  
pp. 6748-6769 ◽  
Author(s):  
Kasparas Rakstys ◽  
Cansu Igci ◽  
Mohammad Khaja Nazeeruddin
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Free Hole ◽  
Device Stability ◽  
Hole Transporting ◽  
Hole Transporting Materials

Doping of hole transporting materials typically increases the efficiency of perovskite solar cells but remains questionable for overall device stability.

scholarly journals Methylammonium-free, high-performance, and stable perovskite solar cells on a planar architecture

Science ◽  
2018 ◽  
Vol 362 (6413) ◽  
pp. 449-453 ◽  
Author(s):  
Silver-Hamill Turren-Cruz ◽  
Anders Hagfeldt ◽  
Michael Saliba
Keyword(s):  
Solar Cells ◽  
High Performance ◽  
Perovskite Solar Cells ◽  
Flexible Substrates ◽  
Device Architecture ◽  
Inorganic Cation ◽  
Hole Transporting ◽  
Improved Stability ◽  
Planar Device

Currently, perovskite solar cells (PSCs) with high performances greater than 20% contain bromine (Br), causing a suboptimal bandgap, and the thermally unstable methylammonium (MA) molecule. Avoiding Br and especially MA can therefore result in more optimal bandgaps and stable perovskites. We show that inorganic cation tuning, using rubidium and cesium, enables highly crystalline formamidinium-based perovskites without Br or MA. On a conventional, planar device architecture, using polymeric interlayers at the electron- and hole-transporting interface, we demonstrate an efficiency of 20.35% (stabilized), one of the highest for MA-free perovskites, with a drastically improved stability reached without the stabilizing influence of mesoporous interlayers. The perovskite is not heated beyond 100°C. Going MA-free is a new direction for perovskites that are inherently stable and compatible with tandems or flexible substrates, which are the main routes commercializing PSCs.

A high performance and low-cost hole transporting layer for efficient and stable perovskite solar cells

2017 ◽  
Vol 19 (31) ◽  
pp. 21033-21045 ◽  
Author(s):  
Md Arafat Mahmud ◽  
Naveen Kumar Elumalai ◽  
Mushfika Baishakhi Upama ◽  
Dian Wang ◽  
Vinicius R. Gonçales ◽  
...  
Keyword(s):  
Solar Cells ◽  
High Performance ◽  
Low Cost ◽  
Perovskite Solar Cells ◽  
Device Stability ◽  
Hole Transporting

A F4TCNQ doped FDT HTL based PSC demonstrates 75% higher device stability than a conventional Li-TFSI doped FDT based PSC.

Cu2−xGeS3: a new hole transporting material for stable and efficient perovskite solar cells

2017 ◽  
Vol 5 (37) ◽  
pp. 19884-19891 ◽  
Author(s):  
Xin Jin ◽  
Xunyong Lei ◽  
Chunyan Wu ◽  
Guoshun Jiang ◽  
Weifeng Liu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Device Stability ◽  
Hole Transporting ◽  
Hole Transporting Material

An alternative hole transporting material Cu2−xGeS3 is developed for perovskite solar cells, which can improve both efficiency and device stability.

Molecular engineering of face-on oriented dopant-free hole transporting material for perovskite solar cells with 19% PCE

2017 ◽  
Vol 5 (17) ◽  
pp. 7811-7815 ◽  
Author(s):  
Kasparas Rakstys ◽  
Sanghyun Paek ◽  
Peng Gao ◽  
Paul Gratia ◽  
Tomasz Marszalek ◽  
...  
Keyword(s):  
Solar Cells ◽  
Charge Transport ◽  
Perovskite Solar Cells ◽  
Molecular Engineering ◽  
Free Hole ◽  
Hole Transporting ◽  
Improved Stability ◽  
Hole Transporting Material

Dopant-free HTM KR321 showed highly ordered characteristic face-on organization leading to increased vertical charge transport and PCE over 19% in PSC with improved stability.

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