scholarly journals α-DTC70 fullerene performs significantly better than β-DTC70 as electron transporting material in perovskite solar cells

2020 ◽  
Vol 8 (20) ◽  
pp. 6813-6819 ◽  
Author(s):  
Edison Castro ◽  
Olivia Fernandez-Delgado ◽  
Albert Artigas ◽  
Gerardo Zavala ◽  
Fang Liu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Better Than

In this work, two new C70 isomers α and β bis(2-(thiophen-2-yl)ethyl)-C70-fullerene mono-adducts (DTC70) were synthesized, characterized and used as electron transporting materials (ETMs) in perovskite solar cells (PSCs).

scholarly journals Boosting efficiency of planar heterojunction perovskite solar cells by a low temperature TiCl4 treatment

2018 ◽  
Vol 08 (02) ◽  
pp. 1850009
Author(s):  
Enqi Wang ◽  
Peng Chen ◽  
Xingtian Yin ◽  
Bowen Gao ◽  
Wenxiu Que
Keyword(s):  
Solar Cells ◽  
Low Temperature ◽  
Surface Defects ◽  
Perovskite Solar Cells ◽  
Transport Layer ◽  
Electron Transport Layer ◽  
Trap States ◽  
Control Devices ◽  
Planar Heterojunction ◽  
Better Than

It is well known that electron transport layer (ETL) plays an indispensable role in the planar heterojunction perovskite solar cells (PSCs). TiO2 is widely used as an ETL material due to its excellent transport properties, however, the presence of defects in the TiO2 layer diminishes the power conversion efficiency (PCE) of the devices. Herein, we introduce a method of low-temperature TiCl4 treatment to deposit a TiOx layer on the surface of TiO2 film, which can effectively passivate trap states at the TiO2 surface. Moreover, the treating process is optimized to be 30[Formula: see text]min using a 40[Formula: see text]mM TiCl4 aqueous solution. Benefiting from this, we obtain the champion device with the highest PCE of 18.47%, which is mainly due to the reduction of surface defects and the deposition of the well-crystallized perovskite films. Besides, the modified PSCs exhibit an average PCE of 17.59%, which is much better than the control devices.

Orientationally engineered 2D/3D perovskite for high efficiency solar cells

2020 ◽  
Vol 4 (1) ◽  
pp. 324-330 ◽  
Author(s):  
Muhammad Sohail Abbas ◽  
Sabir Hussain ◽  
Jinaqi Zhang ◽  
Boxin Wang ◽  
Chen Yang ◽  
...  
Keyword(s):  
Solar Cells ◽  
High Efficiency ◽  
Perovskite Phase ◽  
Perovskite Solar Cells ◽  
Vertical Orientation ◽  
High Efficiency Solar Cells ◽  
Improve Stability ◽  
Better Than

A 2D–3D perovskite, in which 3D perovskite phase is bridged by 2D perovskite having periodically repeated vertical orientation is reported. It's PCE and stability is better than 3D MAPbI3 and it is an excellent structural strategy to improve stability of perovskite solar cells.

scholarly journals Growth process control produces high-crystallinity and complete-reaction perovskite solar cells

RSC Advances ◽  
2020 ◽  
Vol 10 (59) ◽  
pp. 35898-35905
Author(s):  
Chun-Hsiao Kuan ◽  
Po-Tsun Kuo ◽  
Cheng-Hung Hou ◽  
Jing-Jong Shyue ◽  
Ching-Fuh Lin
Keyword(s):  
Solar Cells ◽  
Process Control ◽  
Growth Process ◽  
Thermal Evaporation ◽  
Perovskite Solar Cells ◽  
New Method ◽  
Growth Time ◽  
High Crystallinity ◽  
Complete Reaction ◽  
Better Than

The growth process control (GPC) method, a new method which is better than thermal evaporation, for producing high-crystallinity perovskites by controlling the growth time in a low vacuum, is explored in this work.

scholarly journals Preparing Ambient-Processed Perovskite Solar Cells with Better Electronic Properties via Preheating Assisted One-Step Deposition Method

2020 ◽  
Vol 15 (1) ◽  
Author(s):  
Xi Zhang ◽  
Wenyao Yang ◽  
Jingjing Qi ◽  
Yinggang Hu
Keyword(s):  
Solar Cells ◽  
High Performance ◽  
Perovskite Solar Cells ◽  
Inert Atmosphere ◽  
Ambient Condition ◽  
Water Molecules ◽  
Deposition Method ◽  
Fabrication Cost ◽  
One Step ◽  
Better Than

Abstract Although the power conversion efficiency (PCE) of perovskite solar cells (PSCs) increases rapidly, there are still some issues that limit their commercialization. The perovskite is sensitive to the water molecules, increasing the difficulty in the preparation of perovskite films in ambient condition. Most high-performance PSCs based on conventional method are required to be prepared in inert atmosphere condition, which increase the fabrication cost. To fabricate the high-quality perovskite in ambient condition, we preheated the substrates and selected the proper anti-solvent. As a result, the target perovskite films show a better crystallinity compared with perovskite film prepared via the conventional one-step deposition method in ambient condition. The PSCs prepared in ambient condition yield the improved PCE of 16.89% from a PCE of 11.59%. Compared with the reference devices, the performance stability of target PSCs is much better than that of reference PSCs.

A thiourea additive-based quadruple cation lead halide perovskite with an ultra-large grain size for efficient perovskite solar cells

Nanoscale ◽  
2019 ◽  
Vol 11 (45) ◽  
pp. 21824-21833 ◽  
Author(s):  
Jyoti V. Patil ◽  
Sawanta S. Mali ◽  
Chang Kook Hong
Keyword(s):  
Thin Films ◽  
Grain Size ◽  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Power Conversion ◽  
Perovskite Solar Cells ◽  
Inorganic Perovskite ◽  
Halide Perovskite ◽  
Lead Halide

Controlling the grain size of the organic–inorganic perovskite thin films using thiourea additives now crossing 2 μm size with >20% power conversion efficiency.

A new class of passivating molecules for perovskite solar cells: preliminary insights.

2020 ◽  
Author(s):  
Lucas Scalon ◽  
Francineide Lopes de Araújo ◽  
Caio Costa Oliveira ◽  
Ana Flávia Nogueira
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
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