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.

scholarly journals Effects of 5-Ammonium Valeric Acid Iodide as Additive on Methyl Ammonium Lead Iodide Perovskite Solar Cells

Nanomaterials ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 2512
Author(s):  
Daming Zheng ◽  
Changheng Tong ◽  
Tao Zhu ◽  
Yaoguang Rong ◽  
Thierry Pauporté
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Single Crystal Silicon ◽  
Mesoporous Structure ◽  
Valeric Acid ◽  
Electrical Impedance Spectroscopy ◽  
Lead Iodide ◽  
Crystal Silicon ◽  
Time Resolved ◽  
Hole Transporting

During the past decade, the power conversion efficiency (PCE) of perovskite solar cells (PSCs) has risen rapidly, and it now approaches the record for single crystal silicon solar cells. However, these devices still suffer from a problem of stability. To improve PSC stability, two approaches have been notably developed: the use of additives and/or post-treatments that can strengthen perovskite structures and the use of a nontypical architecture where three mesoporous layers, including a porous carbon backcontact without hole transporting layer, are employed. This paper focuses on 5-ammonium valeric acid iodide (5-AVAI or AVA) as an additive in methylammonium lead iodide (MAPI). By combining scanning electron microscopy (SEM), X-ray diffraction (XRD), time-resolved photoluminescence (TRPL), current–voltage measurements, ideality factor determination, and in-depth electrical impedance spectroscopy (EIS) investigations on various layers stacks structures, we discriminated the effects of a mesoscopic scaffold and an AVA additive. The AVA additive was found to decrease the bulk defects in perovskite (PVK) and boost the PVK resistance to moisture. The triple mesoporous structure was detrimental for the defects, but it improved the stability against humidity. On standard architecture, the PCE is 16.9% with the AVA additive instead of 18.1% for the control. A high stability of TiO2/ZrO2/carbon/perovskite cells was found due to both AVA and the protection by the all-inorganic scaffold. These cells achieved a PCE of 14.4% in the present work.

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.

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.

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.

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.

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.

scholarly journals Low-Toxicity Perovskite Applications in Carbon Electrode Perovskite Solar Cells—A Review

Electronics ◽  
2021 ◽  
Vol 10 (10) ◽  
pp. 1145
Author(s):  
Maria Bidikoudi ◽  
Carmen Simal ◽  
Elias Stathatos
Keyword(s):  
Solar Cells ◽  
Low Cost ◽  
Perovskite Solar Cells ◽  
Metal Electrode ◽  
Carbon Electrode ◽  
Scaling Methods ◽  
Hole Transporting ◽  
Earth Abundant ◽  
One Step ◽  
Low Toxicity

Perovskite solar cells (PSCs) with earth-abundant carbon as an effective replacer for unstable hole-transporting materials and expensive electrodes is a recently proposed structure promising better air and moisture stability. In this review paper, we report on the latest advances and state of the art of Pb-free and low-Pb-content perovskites, used as absorbers in carbon-based perovskite solar cells. The focus is on the implementation of these, environmentally friendly and non-toxic, structures in PSCs with a carbon electrode as a replacement of the noble metal electrode typically used (C-PSCs). The motivation for this study has been the great potential that C-PSCs have shown for the leap towards the commercialization of PSCs. Some of their outstanding properties include low cost, high-stability, ambient processability and compatibility with most up-scaling methods (e.g., printing). By surpassing the key obstacle of toxicity, caused by the Pb content of the highest-performing perovskites, and by combining the advantages of C-PSCs with the Pb-free perovskites low toxicity, this technology will move one step further; this review summarizes the most promising routes that have been reported so far towards that direction.

Sign in / Sign up

Export Citation Format

Share Document