Article
Chemistry, Applied
Hyung Jin Noh, Jung-Min Ji, Sang Pil Hwang, Chul Hoon Kim, Hwan Kyu Kim
Summary: Two new D-pi-A structured dyes (SGT-160 and SGT-161) were designed and synthesized to modulate LUMO energy levels and investigate photophysical, electrochemical properties, and cell performances. The insertion of an additional ethynyl moiety significantly enhanced light-harvesting capability, while pi-extension in the acceptor part stabilized LUMO energy levels. DSSCs based on SGT-160 exhibited high power conversion efficiencies of 10.28%, while DSSCs based on SGT-161 and SGT-130 showed moderate efficiencies of 8.05% and 10.06%, respectively.
Article
Energy & Fuels
Karim Khanmohammadi Chenab, Mohammad Reza Zamani Meymian
Summary: Two novel D-pi-A framework dyes with different π-bridge structures were designed, synthesized and applied in dye-sensitized solar cells (DSSCs). The inclusion of one more aromatic ring in the π-bridge unit of dye molecules significantly changed the optical and electrochemical properties of the dyes, leading to different efficiencies in DSSCs.
Article
Chemistry, Physical
Juganta K. Roy, Ravinder Kaur, Andrew Daniel, Alexandra Baumann, Qing Li, Jared H. Delcamp, Jerzy Leszczynski
Summary: Accessing longer-wavelength photons is crucial for dye-sensitized solar cells (DSSCs). In this study, five new metal-free dyes were characterized theoretically, and the results showed that replacing certain building blocks could improve the performance of DSSCs. The findings provide important guidance for the synthesis of long-wavelength absorbing materials.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Nanoscience & Nanotechnology
Jung-Min Ji, Hyun Jae Lee, Haoran Zhou, Yu Kyung Eom, Chul Hoon Kim, Hwan Kyu Kim
Summary: This study develops three new D-ir-A-structured organic dyes with extended ir-conjugation, which can adjust the HOMO/LUMO levels and expand the light absorption range. These dyes have promising features such as enhanced charge transfer and good power conversion efficiency.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Selvam Prabu, Thamodharan Viswanathan, Ezhumalai David, Sivanadanam Jagadeeswari, Nallasamy Palanisami
Summary: A new set of D-D'-p-p based dyes Fc-(OCH3-Ph)C=CH-CH=CN-R{R=COOH (1) and C6H4-COOH (2)} were synthesized and characterized for DSSC applications. The dyes showed stable thermal properties and efficient charge separation through intramolecular charge transfer. The addition of CDCA as a co-adsorbent improved the photovoltaic performance of the dyes, especially for dye 2 with additional p-linkers and acceptor unit.
Article
Nanoscience & Nanotechnology
Masaaki Mitsui, Yushiro Nakagome, Yoshiki Niihori, Shota Inoue, Yutaka Fujiwara, Kenji Kobayashi
Summary: Two starburst-shaped organic chromophores were synthesized and applied to dye-sensitized solar cells. SB-08 showed better performance than SB-07, with a higher incident photon-to-current conversion efficiency and power conversion efficiency. This new architecture allows flexible modification of branches to enhance light-harvesting ability and electron transport pathways.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Materials Science, Multidisciplinary
Xu-Feng Zang, Haoliang Cheng, Min Chen, Yingying Zhang, Tao Huang, Hui-ling Xia
Summary: Three novel diketopyrrolopyrrole-based metal-free organic dyes (TPh, BPh and SPh) with different pi-bridge lengths were designed and synthesized for DSSCs. The prolongation of pi-bridge length by introducing an additional phenyl unit results in an extra torsion in the structural framework and reduces the molecule planarity, affecting light-harvesting ability. A moderate pi-bridge length (BPh) achieves the best balance of overall performances, with the highest power conversion efficiency (6.57%) achieved.
Article
Energy & Fuels
Dinesh Nugegoda, Shrabanti Bhattacharya, Leigh Anna Hunt, Samantha J. Schwartz, Zane H. Turner, Nathan Hammer, Jonah W. Jurss, Jared H. Delcamp
Summary: Productive electron transfer between dye and redox shuttle is crucial for high-performing dye-sensitized solar cells. This study demonstrates that noncovalent self-assembly of dye and redox shuttle via g-stacking interactions can increase the electron transfer rate. The use of a dye with pyrene-based donor group and a redox shuttle with pyrene substitution leads to enhanced dye regeneration and reduced recombination rate. A power conversion efficiency of 22.8% is achieved under fluorescent lighting conditions.
Article
Chemistry, Applied
David Moe Almenningen, Henrik Erring Hansen, Audun Formo Buene, Bard Helge Hoff, Odd Reidar Gautun
Summary: To achieve high photocurrents, it is essential for dye-sensitized solar cells (DSSC) to effectively absorb sunlight. This study investigates the use of oligothiophene pi-spacers in triarylamine dyes and assesses their suitability for modern copper based DSSC devices. The results show that the dye with the smallest pi-spacer, dithieno[3,2-b:2',3' -d]thiophene, exhibited the highest efficiency. The DSSC device sensitized by this dye achieved a power conversion efficiency of 4.4%. Additionally, thinner TiO2 layers were found to result in better DSSC performance for all the dyes tested.
Review
Chemistry, Multidisciplinary
Ana Belen Munoz-Garcia, Iacopo Benesperi, Gerrit Boschloo, Javier J. Concepcion, Jared H. Delcamp, Elizabeth A. Gibson, Gerald J. Meyer, Michele Pavone, Henrik Pettersson, Anders Hagfeldt, Marina Freitag
Summary: Dye-sensitized solar cells (DSCs) and dye-sensitized photoelectrochemical cells (DSPECs) have seen a revival in recent years as they offer unique properties such as low cost, non-toxic materials, colorfulness, transparency, and efficiency in low light conditions. This review covers advancements in DSC technology over the past decade, including theoretical studies, characterization techniques, materials, applications, and commercialization efforts by various companies.
CHEMICAL SOCIETY REVIEWS
(2021)
Article
Chemistry, Applied
Ihssene Ouared, Maammar Rekis, Mohamed Trari
Summary: In this study, six new organic dyes were investigated using density functional theory (DFT). The theoretical photovoltaic properties indicated that the overall yield of the solar cell could be remarkably improved with the designed dyes, making them potential candidates as photosensitizers for dye sensitized solar cells (DSSCs). The dye bearing dioxythiophene linker showed the highest absorption maxima among the investigated dyes.
Article
Chemistry, Applied
Yongjie Ding, Jianhua Li, Shuaishuai Liu, Yanfang Tan, Kaihang Shi, Yunfei Jiao, Baoxiu Mi, Wenjuan Xu, Zhiqiang Gao
Summary: Two new phenothiazine dyes CBPTZ-BTD1 and CBPTZ-BTD2 were designed and synthesized in this work, with CBPTZ-BTD2 showing higher dye loading and strengthened ICT effect compared to CBPTZ-BTD1, resulting in better photovoltaic performance.
Article
Energy & Fuels
Chaoqiang Liao, Hanlun Wu, Hao Tang, Lingyun Wang, Derong Cao
Summary: This study constructed four phenothiazine dyes and applied them to fabricate DSSCs. The results showed that introducing isoindigo can achieve panchromatic absorption of dyes, and thieno[3,2-b]thiophene is a better pi-bridge. However, the efficiency of isoindigo-based dyes is lower.
Article
Energy & Fuels
Zhi-Sheng Wu, Wang-Jun Guo, Xin-Chao Song, Jian-Qun Liu, Hu-Sheng Wang, Tao Yu, Tian-Yi Han, Jie Zhang, Zheng-Jian Chen
Summary: A series of organic co-sensitizers (CS1-3) for thiourea dye D8 were designed and synthesized to enhance the conversion efficiency of organic dye sensitized solar cells (DSSCs). These co-sensitizers showed improved power conversion efficiency compared to devices without co-sensitizers, with CS3 exhibiting the highest PCE of 8.53%. The incorporation of a benzene terminal group in CS3 was found to prevent aggregation and electron recombination, contributing to the enhanced performance of the co-sensitized cells.
Article
Chemistry, Multidisciplinary
Peijin Zheng, Jian Xu, Fei Peng, Shengming Peng, Junxu Liao, Hongbin Zhao, Ledong Li, Xiangyan Zeng, Heyu Yu
Summary: The dye BT5, with a carbazole-containing triarylamine as the electron-donating unit, shows better photovoltaic performance, broader absorption spectrum, and higher molar extinction coefficient in DSCs compared to BT4 and BT6. Incorporating the BT unit into the dye backbone can lead to a pronounced electron transfer effect, affecting the absorption bands, Stokes shifts, and overall power conversion efficiency of DSCs.
NEW JOURNAL OF CHEMISTRY
(2021)
Review
Chemistry, Multidisciplinary
Longhui Deng, Yanrui Liu, Yingyao Zhang, Suhao Wang, Peng Gao
Summary: The article summarizes the basic principles of organic thermoelectric materials, reviews recent progress, and discusses the relationship between structure and properties in high-performance organic thermoelectric materials. The article also explores the important influence of various components in molecular structure on thermoelectric properties and envisions future research directions for organic thermoelectric materials.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Engineering, Environmental
Shibo Wang, Fengxian Cao, Pengxu Chen, Ruowei He, Anling Tong, Zhang Lan, Peng Gao, Weihai Sun, Jihuai Wu
Summary: By combining the moisture and thermal stability of 2D perovskites with the photoelectronic features of 3D perovskites, a 3D/2D structure has been demonstrated to improve the efficiency and durability of perovskite solar cells.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Chemistry, Multidisciplinary
Can Wang, Peng Gao
Summary: This paper summarizes the application of radical molecules in perovskite solar cells (PSCs). Radical molecules can improve the performance of perovskite and enhance the conductivity and mobility of the charge transport layer. They also enhance oxygen stability, modulate work function, and decrease by-product generation. Future research directions for utilizing radical molecules to improve the performance of PSCs are envisioned.
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
(2023)
Review
Chemistry, Multidisciplinary
Zhihao Zhang, Lu Qiao, Ke Meng, Run Long, Gang Chen, Peng Gao
Summary: Lead halide perovskite solar cells have achieved significant progress in efficiency and stability. This review discusses various passivation strategies to address the challenges of defects, charge recombination, and stability in perovskite materials. The article also highlights the need for advanced characterization techniques to understand the mechanisms behind the passivation strategies, and proposes future research directions.
CHEMICAL SOCIETY REVIEWS
(2023)
Review
Chemistry, Analytical
Huadeng Xie, Yingyao Zhang, Peng Gao
Summary: The Internet of Things (IoT) is a network that connects human beings and machines through various sensors and the internet. However, the limited energy supply is a barrier for large-scale implementation of the IoT. Thermoelectric generators (TEGs), which can convert thermal gradients into electricity, have gained significant attention in the IoT field due to their small size, long maintenance cycles, high stability, and noise-free operation. Therefore, integrating advanced research on TEGs into IoT is crucial. This review outlines the basic principle of thermoelectricity and summarizes the common preparation methods for thermoelectric functional parts in TEGs. It also discusses the applications of TEG-powered sensors in the human body, such as wearable and implantable medical devices, as well as the use of scene sensors in IoT applications like building energy management and airliners. The review concludes with an outlook on current challenges and opportunities.
Article
Chemistry, Physical
Chunyan Deng, Jihuai Wu, Yuqian Yang, Yitian Du, Ruoshui Li, Qi Chen, Yuan Xu, Weihai Sun, Zhang Lan, Peng Gao
Summary: By functionalizing the buried interface using DDSI2, the distribution and size of PbI2 clusters can be modulated, leading to improved performance of perovskite films. DDSI2 serves as a multifunctional modifier that optimizes the energy level of SnO2 and passivates buried interface defects. The hydrogen bonding and coordination between DDSI2 and perovskite reduce crystal growth rate and lattice stress, resulting in enhanced perovskite quality and modulated PbI2 distribution. The DDSI2-modified device exhibits a power conversion efficiency of 24.10% and a storage stability of 1800 h, demonstrating a unique strategy for the rational control of PbI2 in efficient and stable perovskite solar cells.
ACS ENERGY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Yixuan Zhu, Yu Zhou, Lu Ren, Jingyao Ye, Haichuan Wang, Xinyuan Liu, Ruiyun Huang, Haojie Liu, Junyang Liu, Jia Shi, Peng Gao, Wenjing Hong
Summary: The charge transport through single-molecule electronic devices can be mechanically controlled by changing the molecular geometrical configuration in situ, achieving conductance variations of more than four orders of magnitude. This is achieved by switching between constructive and destructive quantum interference pathways through designing molecules with multiple anchoring groups and shifting the electrodes within a range of about 0.6 nm. The tunable conductance range achieved using this mechanical tuning strategy is the highest reported so far.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Feng Li, Can Cuhadar, Zilong Zhang, Shanay Jindal, Zehan Huang, Ni Zhang, Hoi Nok Tsao, Peng Gao
Summary: Power sources that can be charged anytime and anywhere are highly desirable for mobile devices. In this work, we propose the use of a photocapacitor as a wireless charging device, which harnesses light as a renewable energy source. To ensure uninterrupted operation, these photocapacitors can be charged using day or room light, as well as near-IR radiation. By utilizing isoindigo-based D-pi-A photoactive dyes, we demonstrate high photovoltages, area-specific capacitances, and charge-discharge stability in these photocapacitors.
CHEMISTRY-AN ASIAN JOURNAL
(2023)
Article
Chemistry, Organic
Prabhu Ganesan, Paramaguru Ganesan, Zilong Zhang, Jianbin Xu, Renganathan Rajalingam, Peng Gao
Summary: Imidazole-based donor-acceptor materials exhibit polarity-controlled trade-off between short-wavelength (SW) emission and long-wavelength (LW) emission. By synthesizing and verifying imidazole-based donor-acceptor fluorophores with different electron-donating groups, it was found that certain compounds showed dual emission in solvents of varying polarity, while others only exhibited SW emission. DFT calculations and experimental results revealed the different origins of SW and LW emissions. This work provides a new approach for achieving concurrent SW and LW emission characteristics and offers insights for the design of panchromatic emitters for lighting and display applications.
JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Chia-Hsun Hsu, Run-Feng Zhu, Pin-Chun Kang, Peng Gao, Wan-Yu Wu, Dong-Sing Wuu, Shui-Yang Lien, Wen-Zhang Zhu
Summary: This research focuses on the fabrication of amorphous gallium oxide (alpha-Ga2O3) films for flexible deep ultraviolet photodetectors. The films are deposited using high-speed spatial atomic layer deposition (SALD) at different substrate temperatures. The experimental results reveal that the deposition rate is significantly enhanced under saturated SALD conditions, leading to better film quality with fewer impurities and defects. Finally, a high-performance flexible deep ultraviolet alpha-Ga2O3 photodetector is achieved with fast decay time and low dark current density.
Article
Biochemistry & Molecular Biology
Tinghao Li, Qiu Xiong, Chongzhu Hu, Can Wang, Ni Zhang, Shui-Yang Lien, Peng Gao
Summary: The two-step sequential deposition method is commonly used for fabricating perovskite solar cells (PSCs) due to its reproducibility and tolerant preparation conditions. However, subpar crystalline quality in the perovskite films is often observed due to less-than-favorable diffusive processes. In this study, a simple strategy of lowering the temperature of the organic-cation precursor solutions was employed to regulate the crystallization process, resulting in improved crystalline orientation and boosted power conversion efficiency in the fabricated PSCs.
Article
Materials Science, Multidisciplinary
Yitian Du, Ying Wang, Jihuai Wu, Qi Chen, Chunyan Deng, Ran Ji, Liuxue Sun, Lina Tan, Xia Chen, Yiming Xie, Yunfang Huang, Yana Vaynzof, Peng Gao, Weihai Sun, Zhang Lan
Summary: Sodium bicarbonate is used as an additive in perovskite solar cells to improve the formation of perovskite film and enhance the crystallinity and grain structure, resulting in improved device efficiency and stability.
Article
Nanoscience & Nanotechnology
Ming Yuan, Si Liu, Hong Li, Yifeng Gao, Shui Yu, Yaming Yu, Lingyi Meng, Wen Liu, Jiaoxia Zhang, Peng Gao
Summary: Solar cells are renewable green energy sources that can address environmental pollution and the scarcity of fossil fuels, making them of great interest to scientists. The use of surface plasmon resonance to enhance solar device performance is a promising concept. In this study, gold nanorods were introduced into the perovskite active layer to form composites, resulting in improved short circuit current density, filling factor, and power conversion efficiency. The plasmon resonance effect enhances the light-harvesting ability of the perovskite layer, leading to increased carrier formation and reduced carrier recombination.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2023)
Article
Chemistry, Physical
Peng Huang, Manju Sheokand, David Payno Zarceno, Samrana Kazim, Luis Lezama, Mohammad Khaja Nazeeruddin, Rajneesh Misra, Shahzada Ahmad
Summary: To solve the toxicity issues related to lead-based halide perovskite solar cells, a lead-free double halide perovskite Cs2AgBiBr6 is proposed. However, the reduced rate of charge transfer affects the optoelectronic performance of double perovskites. By using interface engineering, a series of pyridine-based small molecules with different arms attached to the pyridine core are designed as hole-selective materials. The solar cells fabricated using Cs2AgBiBr6 as a light harvester and the designed hole-selective layer showed an unprecedented 2.9% power conversion efficiency. Our findings provide guidance for designing small molecules for electro-optical applications and developing lead-free perovskite materials for solar applications.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Fatemeh Sadeghi, Babak Pashaei, Babak Nemati Bideh, Negin Sabahi, Hashem Shahroosvand, Mohammad Khaja Nazeeruddin
Summary: Low-cost and facile synthesis routes of hole-transporting materials (HTMs) are promising for reducing the cost of perovskite solar cells. In this study, a cost-effective HTM based on imidazole was synthesized and showed comparable performance to a traditional HTM (spiro-OMeTAD). The easy synthesis and low cost of this HTM make it a potential candidate for low-cost solar cells.
