Article
Energy & Fuels
Li Tian, Jianhua Jing, Haoran Tang, Yuanying Liang, Zhicheng Hu, Muhammad Rafiq, Fei Huang, Yong Cao
Summary: This study designed a series of novel n-doped conjugated polyelectrolytes with high doping levels and conductivity, synthesized from bis-isatin and bis-oxindole monomers. The evolution of counterions further alters their n-doping behaviors and work function tunability. Used as electron transport materials in nonfullerene polymer solar cells, they can achieve high power conversion efficiencies over 16%.
Article
Chemistry, Physical
Akbar Ali Qureshi, Hafiz Muhammad Asif Javed, Sofia Javed, Ayesha Bashir, Muhammad Usman, Aftab Akram, M. Irfan Ahmad, Usman Ali, Muhammad Shahid, Muhammad Rizwan, Sabir Ali Raza
Summary: The use of zirconium-doped TiO2 nanoparticles as an ETL in PSC significantly improves the power conversion efficiency. Additionally, the newly synthesized Zr-TiO2 nanoparticles also show good performance in photocatalytic activity.
SURFACES AND INTERFACES
(2021)
Article
Nanoscience & Nanotechnology
Qi Lu, Mingqiang Ding, Anqi Zhou, Pengzhi Guo, Qian Wang, Jianfeng Li, Daoxian Li, Junhong Liang, Hanyoung Woo, Yangjun Xia
Summary: In this study, a novel alcohol-soluble nitrogen oxide radical conjugated polymer (PBN-NO) with dimethylamine groups and TEMPO radical side-chain groups was developed as a cathode interfacial modifer (CIM) in organic solar cells (OSCs). Compared to commonly used CIMs, such as PFN, PDINO, and PDINN, the OSCs with PBN-NO exhibited higher or comparable power conversion efficiencies (PCEs) (16.19% vs 13.10%, 15.60%, and 16.15%), as well as improved photostability and thermal stability. The reasons for the improved PCEs were systematically investigated through various comparative experiments, including exciton dissociation, charge recombination, capacitance-voltage (C-V) measurements, etc. This is the first report on an alcohol-soluble nitroxide radical conjugated polymer that combines the interfacial modification of polar groups and enhanced conductivity through dangling radicals, contributing to efficient OSCs with enhanced stability.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Energy & Fuels
Zhenyun Zhang, Fazheng Qiu, Tao Shen, Lei Xu, Jingyuan Ma, Junjie Qi
Summary: A bimetal Co/Eu co-doping strategy was proposed to modify the electron transportation layer (ETL) in carbon-based hole-transport materials (HTM)-free perovskite solar cells (C-PSCs), resulting in significant enhancement of photovoltaic parameters and power conversion efficiencies (PCEs) from 11.12% to 14.06% while maintaining superior device stability. This approach provides possibilities for further exploration of high-efficiency C-PSCs by optimizing ETL with suitable doping.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Chemistry, Physical
Xiuhong Sun, Yonghai Li, Dachang Liu, Ruichen Liu, Bingqian Zhang, Qingyong Tian, Bin Fan, Xianzhao Wang, Zhipeng Li, Zhipeng Shao, Xiao Wang, Guanglei Cui, Shuping Pang
Summary: This study demonstrates that introducing an appropriate amount of n-type polymer N2200 into PCBM can enhance the electrical properties of PCBM and passivate the defects on the perovskite surface. The modified PCBM improves band alignment, enhances electron mobility, and exhibits improved efficiency and stability in perovskite solar cells.
ADVANCED ENERGY MATERIALS
(2023)
Review
Polymer Science
Xiao-Jun Li, Guang-Pei Sun, Yu-Fei Gong, Yong-Fang Li
Summary: The active layer of polymer solar cells consists of a blend of p-type and n-type conjugated polymers. The poor photovoltaic performance of n-type polymers limited the power conversion efficiency of all-polymer solar cells before 2016. However, the development of polymerized small molecule acceptors (PSMAs) and A-DA'D-A type small molecule acceptors (SMAs) have greatly improved the photovoltaic performance of these solar cells, with recent efficiencies reaching 17%-18%. This review article discusses the development history and recent research progress of n-type conjugated polymers, particularly focusing on the PSMAs.
CHINESE JOURNAL OF POLYMER SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Teck Lip Dexter Tam, Ming Lin, Albertus Denny Handoko, Jianwei Xu
Summary: In this study, sequential solution doping of a ladder-type poly(BBL) with different viologen radical cations was conducted to investigate the dopant-polymer interaction. It was found that the anion-π (radical) interaction between the counteranion and BBL negatively affected the charge transport properties and thermoelectric performance. The solution state of the viologen radical cation during the doping process, controlled by N-substitution bulkiness and counteranion Lewis basicity, played a crucial role in determining the conductivity and Seebeck coefficients of the doped BBL.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Abhishek Raj, Manish Kumar, Arvind Kumar, Amel Laref, Kedar Singh, Subhash Sharma, Avneesh Anshul
Summary: Titanium dioxide is widely used in perovskite solar cells, but its future applicability is hindered by high annealing temperature and the hysteresis effect. Recent strategies such as doping engineering have significantly improved the device performance and stability.
Article
Chemistry, Physical
Hyun-Jung Lee, Seok-In Na
Summary: This study comprehensively investigates and compares the performance of PCBM/ZnO and C-60/BCP as electron transport layer materials in high-performance perovskite solar cells. The results show that PCBM/ZnO has higher energy conversion efficiency, while C-60/BCP exhibits better stability.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Anirudh Sharma, Saumya Singh, Xin Song, Diego Rosas Villalva, Joel Troughton, Daniel Corzo, Levent Toppare, Gorkem Gunbas, Bob C. Schroeder, Derya Baran
Summary: The study introduces a new efficient CIL based on a naphthalene diimide core and oligo (ethylene glycol) side-chain conjugated polymer, which demonstrates good thermal stability and ease of processing, leading to improved photovoltaic parameters, reduced carrier recombination, and enhanced device performance.
CHEMISTRY OF MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Guangdong Li, Mingxiang Xu, Zhong Chen, Xiaoping Zou
Summary: A novel inverted tin-based perovskite solar cell without an electron transport layer has been investigated, utilizing a p-type MASnI3/n-type MASnI3 all-perovskite homojunction as the light absorber, using simulation software. The optimized device achieved an optimal power conversion efficiency (PCE) of 20.5609% with an optimal hole transport layer thickness of 30 nm and a perovskite layer thickness of 200 nm. This study provides valuable references for future research in optoelectronic and electro-optical devices.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Qi-Yi Li, Ze-Fan Yao, Hao-Tian Wu, Longfei Luo, Yi-Fan Ding, Chi-Yuan Yang, Xin-Yi Wang, Zhihao Shen, Jie-Yu Wang, Jian Pei
Summary: This study presents a strategy for achieving efficient charge transport and high doping compatibility in n-doped conjugated polymers. By using disorder side-chains, the issue of compatibility is addressed, allowing for the accommodation of molecular dopants without compromising the original chain packing and charge transport channels.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Applied
M. M. Tepliakova, I. E. Kuznetsov, D. S. Zamoretskov, A. N. Zhivchikova, A. V. Lolaeva, M. A. Sandzhieva, S. V. Makarov, M. V. Klyuev, D. K. Sagdullina, E. O. Perepelitsina, Y. G. Gladush, A. G. Nasibulin, K. J. Stevenson, A. V. Akkuratov, A. D. Furasova
Summary: Conjugated polymers based on benzodithiophene (BDT) and thiophene-flanked thiazolothiazole block (Tz) were designed and studied as promising hole-transport materials (HTMs) for perovskite solar cells (PSCs). The position of side chain greatly affects their performance, and the polymer in-BDTTz showed higher power conversion efficiency and stable operation compared to aus-BDTTz and poly(triarylamine) (PTAA). These alkylsilyl-substituted benzodithiophene-based polymers could be potential dopant-free hole-transport materials for efficient and stable perovskite photovoltaics.
Article
Chemistry, Physical
Lening Shen, Tao Zhu, Xinwen Zhang, Keven Gong, He Wang, Xiong Gong
Summary: This study presents high-performance perovskite solar cells (PSCs) based on a composite of perovskite and a low optical gap conjugated polymer. The composite film exhibits enhanced charge carrier mobility, larger crystal sizes, and suppressed non-radiation charge carrier recombination. Additionally, a photo-induced charge transfer occurs within the composite film, leading to improved power conversion efficiency (PCE) of the PSCs. The un-encapsulated PSCs also demonstrate enhanced stability and reduced photocurrent hysteresis compared to those based on pristine perovskite films.
Article
Chemistry, Physical
Ghazaleh Bagha, Homam Naffakh-Moosavy, Mansour Rezaee Mersagh
Summary: The study found that the use of 5 wt% Ag doping is beneficial for enhancing the performance of ZnO-based PSCs by reducing the recombination rate. By employing rGO sheets, significant improvements in the electrical properties of both undoped and doped ZnO ETLs were observed, leading to enhanced performance of PSCs.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
