Direct C–H arylation synthesis of (DD′AD′DA′)-constituted alternating polymers with low bandgaps and their photovoltaic performance

2015 ◽  
Vol 39 (6) ◽  
pp. 4957-4964 ◽  
Author(s):  
Mohamed Shaker ◽  
Cuc Kim Trinh ◽  
Wonbin Kim ◽  
Heejoo Kim ◽  
Kwanghee Lee ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Intramolecular Charge Transfer ◽  
Power Conversion ◽  
Photovoltaic Performance ◽  
Alternating Copolymers ◽  
Backbone Structure

The alternating copolymers possess a planar backbone structure and high intramolecular charge transfer, and they contain a strong push–pull (D–A) system and gave a power conversion efficiency up to 2.36%.

The effect of different alkyl chains on the photovoltaic performance of D–π–A porphyrin-sensitized solar cells

2015 ◽  
Vol 39 (5) ◽  
pp. 3736-3746 ◽  
Author(s):  
Jiangzhao Chen ◽  
Songguk Ko ◽  
Linfeng Liu ◽  
Yusong Sheng ◽  
Hongwei Han ◽  
...  
Keyword(s):  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Power Conversion ◽  
Photovoltaic Performance ◽  
Alkyl Chains ◽  
Sensitized Solar Cells

Compared to the DSSCs based on WH-C1 and YD20 with short alkyl chains, the device sensitized by WH-C2 with the hexyloxy group shows a significantly enhanced Voc, Jsc and power conversion efficiency (η).

The influence of the central acceptor unit on the optoelectronic properties and photovoltaic performance of A–D–A–D–A-type co-oligomers

2017 ◽  
Vol 4 (5) ◽  
pp. 755-766 ◽  
Author(s):  
Ibrahim Ata ◽  
Duško Popovic ◽  
Mika Lindén ◽  
Amaresh Mishra ◽  
Peter Bäuerle
Keyword(s):  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Organic Solar Cells ◽  
Power Conversion ◽  
Photovoltaic Performance ◽  
Molecular Structures ◽  
Solvent Vapor ◽  
Vapor Annealing ◽  
Solvent Vapor Annealing

A series of A–D–A–D–A co-oligomers was developed and implemented as donor materials in solution-processable organic solar cells showing the dependence of molecular structures on the power conversion efficiency upon solvent vapor annealing.

scholarly journals Single- or double A-site cations in A3Bi2I9 bismuth perovskites: What is the suitable choice?

2021 ◽  
Author(s):  
Feray Ünlü ◽  
Ashish Kulkarni ◽  
Khan Lê ◽  
Christoph Bohr ◽  
Andrea Bliesener ◽  
...  
Keyword(s):  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Power Conversion ◽  
Photovoltaic Performance ◽  
Organic Cations ◽  
Device Performance ◽  
Inorganic Cations ◽  
Device Efficiency ◽  
Bismuth Perovskite ◽  
A Site

Abstract Investigations on the effect of single or double A-site cation engineering on the photovoltaic performance of bismuth perovskite-inspired materials (A3Bi2I9) are rare. Herein, we report novel single- and double-cation based bismuth perovskite-inspired materials developed by (1) completely replacing CH3NH3+ (methylammonium, MA+) in MA3Bi2I9 with various organic cations such as CH(NH2)2+ (formamidinium, FA+), (CH3)2NH2+ (dimethylammonium, DMA+), C(NH2)3+ (guanidinium, GA+) and inorganic cations such as cesium (Cs+), rubidium (Rb+), potassium (K+), sodium (Na+) and lithium (Li+) and (2) partially replacing MA+ with Cs+ in different stoichiometric ratios. Compared to single-cation based bismuth perovskite devices, the double-cation bismuth perovskite device showed an increment in the device power conversion efficiency (PCE) up to 1.5% crediting to the reduction in the bandgap. This is the first study demonstrating double-cation based bismuth perovskite showing bandgap reduction and increment in device efficiency and opens up the possibilities towards compositional engineering for improved device performance. Graphic Abstract

scholarly journals Mn doped CdS passivated CuInSe2 quantum dot sensitized solar cells with remarkably enhanced photovoltaic efficiency

RSC Advances ◽  
2017 ◽  
Vol 7 (53) ◽  
pp. 33106-33112 ◽  
Author(s):  
Ikhtisham Mehmood ◽  
Yueli Liu ◽  
Keqiang Chen ◽  
Abdul Hakim Shah ◽  
Wen Chen
Keyword(s):  
Solar Cells ◽  
Quantum Dot ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Power Conversion ◽  
Photovoltaic Performance ◽  
Photovoltaic Efficiency ◽  
Sensitized Solar Cells ◽  
Mn Doped

This paper explores that novel architecture of CuInSe2/Mn-CdS exhibits remarkable enhancement in photovoltaic performance of the QDSSCs, which presents an excellent power conversion efficiency of 3.96%.

scholarly journals Effect of the π-conjugation length on the properties and photovoltaic performance of A–π–D–π–A type oligothiophenes with a 4,8-bis(thienyl)benzo[1,2-b:4,5-b′]dithiophene core

2016 ◽  
Vol 12 ◽  
pp. 1788-1797 ◽  
Author(s):  
Ni Yin ◽  
Lilei Wang ◽  
Yi Lin ◽  
Jinduo Yi ◽  
Lingpeng Yan ◽  
...  
Keyword(s):  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Organic Solar Cells ◽  
Energy Levels ◽  
Power Conversion ◽  
Photovoltaic Performance ◽  
Terminal Group ◽  
Absorption Bands ◽  
Conjugated Molecules

Benzo[1,2-b:4,5-b′]dithiophene (BDT) is an excellent building block for constructing π-conjugated molecules for the use in organic solar cells. In this paper, four 4,8-bis(5-alkyl-2-thienyl)benzo[1,2-b:4,5-b′]dithiophene (TBDT)-containing A–π–D–π–A-type small molecules (COOP-nHT-TBDT, n = 1, 2, 3, 4), having 2-cyano-3-octyloxy-3-oxo-1-propenyl (COOP) as terminal group and regioregular oligo(3-hexylthiophene) (nHT) as the π-conjugated bridge unit were synthesized. The optical and electrochemical properties of these compounds were systematically investigated. All these four compounds displayed broad absorption bands over 350–600 nm. The optical band gap becomes narrower (from 1.94 to 1.82 eV) and the HOMO energy levels increased (from −5.68 to −5.34 eV) with the increase of the length of the π-conjugated bridge. Organic solar cells using the synthesized compounds as the electron donor and PC61BM as the electron acceptor were fabricated and tested. Results showed that compounds with longer oligothiophene π-bridges have better power conversion efficiency and higher device stability. The device based on the quaterthiophene-bridged compound 4 gave a highest power conversion efficiency of 5.62% with a V OC of 0.93 V, J SC of 9.60 mA·cm−2, and a FF of 0.63.

scholarly journals Alkali Chloride Doped SnO2 Electron-Transporting Layer for Boosting Charge Transfer and Passivating Defects in All-Inorganic CsPbBr3 Perovskite Solar Cells

2021 ◽  
Author(s):  
Guixiang Xie ◽  
Xiaochun Lu ◽  
Jialong Duan ◽  
Yan Dong ◽  
Xiurong Jiang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Charge Transfer ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Power Conversion ◽  
Perovskite Solar Cells ◽  
Alkali Chloride ◽  
Electron Transporting Layer ◽  
Charge Extraction

The electron-transporting layer (ETL) with improved charge extraction-transfer kinetics and the perovskite film with improved quality highly determine the power conversion efficiency (PCE) of perovskite solar cells (PSCs). Herein, various...

Photovoltaic performance and power conversion efficiency prediction of double fence porphyrins

2021 ◽  
Author(s):  
Canpu Yang ◽  
Peng Song ◽  
Reda El-Shishtawy ◽  
Fengcai Ma ◽  
Yuanzuo Li
Keyword(s):  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
High Efficiency ◽  
Power Conversion ◽  
Photovoltaic Performance ◽  
Dye Sensitized Solar Cells ◽  
Zinc Porphyrin ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

To explore high efficiency dye-sensitized solar cells (DSSCs), two experimentally derived (single fence and double fence porphyrins) and two theoretically designed zinc porphyrin molecules with D-D-π-A-A configurations were studied. Density...

Perovskite Solar Cells an Efficient, Low Cost, Emerging Photovoltaic Technology

2020 ◽  
Vol 33 (1) ◽  
pp. 73-81
Author(s):  
Yogesh Kumar Dongre and Sanjay Tiwari
Keyword(s):  
Solar Cell ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Low Cost ◽  
Power Conversion ◽  
Photovoltaic Performance ◽  
Perovskite Solar Cell ◽  
Current Status ◽  
Photovoltaic Devices ◽  
Photovoltaic Technology

Organometal halides compound shortly named as perovskite represent an emerging active layer materials for photovoltaic technology. In recent years perovskite shows capability of developing high performance photovoltaic devices with higher efficiency at a low cost. This review article discuss the current status of methylammonium metal halide (perovskite) based photovoltaic devices and provide a comprehensive review of ABX3 device structures, fabrication methods,synthetization, film properties, and photovoltaic performance. The flexibility, simplicity and low cast processing of perovskite solar cell fabrication methods allow using various types of device architectures. The article also focuses on the journey of perovskite solar cell. In 2009 first perovskite solar cell was reported and it shows power conversion efficiency (PCE) of around 3–4%.In 2017 the PCE was reported around 22.1%, now a day (in 2019) 28% power conversion efficiency is reported by Oxford PV’s which is tandem solar cell based on perovskite-silicon. In this article the issue related to efficiency enhancement, stability and degradation mechanism are presented.

Deposition of loosely bound organic D–A–π–A′ dyes on sensitized TiO2 film: a possible strategy to suppress charge recombination and enhance power conversion efficiency in dye-sensitized solar cells

2014 ◽  
Vol 2 (29) ◽  
pp. 11229-11234 ◽  
Author(s):  
Xiongwu Kang ◽  
Junxiang Zhang ◽  
Anthony J. Rojas ◽  
Daniel O'Neil ◽  
Paul Szymanski ◽  
...  
Keyword(s):  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Tio2 Film ◽  
Power Conversion ◽  
Photovoltaic Performance ◽  
Dye Sensitized Solar Cells ◽  
Direct Arylation ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

A D–A–π–A′ dye for dye-sensitized solar cells was synthesized via sequential C–H direct arylation; the photovoltaic performance was enhanced by deposition of additional dye on TiO2

scholarly journals Enhanced Power Conversion Efficiency of P3HT : PC71BM Bulk Heterojunction Polymer Solar Cells by Doping a High-Mobility Small Organic Molecule

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Hanyu Wang ◽  
Xiao Wang ◽  
Pu Fan ◽  
Xin Yang ◽  
Junsheng Yu
Keyword(s):  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Polymer Solar Cells ◽  
Short Circuit ◽  
Power Conversion ◽  
Photovoltaic Performance ◽  
Acid Methyl Ester ◽  
High Mobility ◽  
Short Circuit Current

The effect of molecular doping with TIPS-pentacene on the photovoltaic performance of polymer solar cells (PSCs) with a structure of ITO/ZnO/poly(3-hexylthiophene-2,5-diyl) (P3HT) : [6,6]-phenyl C71-butyric acid methyl ester (PC71BM) : TIPS-pentacene/MoOx/Ag was systematically investigated by adjusting TIPS-pentacene doping ratios ranged from 0.3 to 1.2 wt%. The device with 0.6 wt% TIPS-pentacene exhibited the enhanced short-circuit current and fill factor by 1.23 mA/cm2and 7.8%, respectively, resulting in a maximum power conversion efficiency of 4.13%, which is one-third higher than that of the undoped one. The photovoltaic performance improvement was mainly due to the balanced charge carrier mobility, enhanced crystallinity, and matched cascade energy level alignment in TIPS-pentacene doped active layer, resulting in the efficient charge separation, transport, and collection.

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