Article
Chemistry, Applied
Xuyu Gao, Huabin Wang, Ruitao Yu, Yijing Wu, Yinming He, Tianjian Yang, Youtian Tao
Summary: A new terpolymer acceptor PNDI-BTzx (x = 5 and 10) was designed by introducing fluorinated benzotriazole (2f-BTz) into the N2200 backbone, leading to enhanced absorption coefficients, weakened polymer crystallinities, and improved polymer miscibility. All-PSCs based on PNDI-BTz5 demonstrated enhanced photovoltaic performance with better thickness tolerance, showing potential for reproducible and thick-film practical applications in all-polymer photovoltaics.
Article
Materials Science, Multidisciplinary
Masahiro Sugiyama, Sophie Jancke, Takafumi Uemura, Masaya Kondo, Yumi Inoue, Naoko Namba, Teppei Araki, Takanori Fukushima, Tsuyoshi Sekitani
Summary: Interface modification with a specific triptycene molecule can enhance the field-effect mobility of various thienoacene-based OSCs in flexible organic thin-film transistors (OTFTs) and increase the crystal grain size of the OSC films.
ORGANIC ELECTRONICS
(2021)
Article
Electrochemistry
Feiyan Wu, Jinliang Liu, Jiabin Liu, Jiyeon Oh, Bin Huang, Dong Chen, Zuoji Liu, Qiannan He, Changduk Yang, Lie Chen
Summary: The development of high-performance polymer acceptors for all-polymer solar cells is a key challenge, and introducing a thiophene with oligoethylene oxide side chains as the third unit can improve the compatibility between the polymer donor and acceptor, resulting in optimized blend film morphology and higher photoelectric conversion efficiency.
Article
Chemistry, Physical
Junhwan Choi, Min Ju Kim, Joo-Young Kim, Eun Kyung Lee, Changhyeon Lee, Youngkeun Park, Juyeon Kang, Jeong-Il Park, Byung Jin Cho, Sung Gap Im
Summary: The electrical characteristics of organic thin-film transistors (OTFTs) are analyzed based on the alkyl chain length of organic semiconductors and surface polarity of polymer dielectrics in this study. It is found that the OTFT performance can be improved by increasing the alkyl chain length in organic semiconductors, while the non-polar dielectric layer can enhance the charge transport characteristics.
Article
Nanoscience & Nanotechnology
Zhengran Yi, Yongkun Yan, Hanlin Wang, Wenhao Li, Kaiqing Liu, Yan Zhao, Guangxin Gu, Yunqi Liu
Summary: This study introduces a synthesis strategy called chain-extending polymerization to design polymer semiconductors and demonstrates its superiority over the conventional synthesis strategy of one-pot polymerization. By utilizing this novel strategy, PDPPTT-vinylene polymers with enhanced charge mobilities and significant crystallization are obtained, achieving the required performance for organic circuits.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Jinseck Kim, Minju Kyeong, Jong-Woon Ha, Hyungju Ahn, Juhyoung Jung, Soodeok Seo, Tan Ngoc-Lan Phan, Changjin Lee, Sung Cheol Yoon, Bumjoon J. Kim, Seo-Jin Ko
Summary: This study introduces a terpolymer strategy to enhance the solubility of donor polymers by incorporating ethyl thiophene-3-carboxylate (ET) into the molecular structure of D18. The resulting eco-friendly processed terpolymers (P(D)s) show outstanding performance in organic solar cells, with a PCE of 15.5% using an eco-compatible solvent. The remarkable performance is attributed to superior charge carrier mobility, suppressed trap-assisted recombination, and substantial semi-crystalline behavior of the blend films. Additionally, the o-xylene-based device exhibits excellent thermal stability with 90% retention of the initial PCE after 300 hours at 100 degrees C.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Article
Chemistry, Multidisciplinary
Hua Tang, Zhihui Liao, Safakath Karuthedath, Si Chen, Heng Liu, Jafar I. I. Khan, Maxime Babics, Wenchao Yang, Maryam Alqurashi, Yakun He, Julien Gorenflot, Jiaming Huang, Gang Li, Stefaan De Wolf, Xinhui Lu, Christoph J. J. Brabec, Frederic Laquai, Shirong Lu
Summary: Random terpolymerization is an effective method for highly efficient and outdoor-stable terpolymer photovoltaics. Spectroscopic, morphological, and computational studies are conducted to reveal the structure-property relationships and key rules for achieving high performance. It is found that introducing a strong electron-deficient or electron-rich third component can broaden absorption and minimize non-radiative voltage losses. Additionally, the third component should manipulate the miscibility of the donor/acceptor towards a thermodynamically stable morphology. The content of the third component should be optimized to maintain molecular orientation and exciton diffusion length, reducing bimolecular carrier recombination. Terpolymer solar cells based on D18 and PM6 show enhanced power conversion efficiency and excellent outdoor stability. These findings provide a rationale for achieving high-performance and outdoor-stable terpolymer photovoltaics, leading the way to commercialization.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Polymer Science
Filip Anies, Zhuoran Qiao, Mohamad Insan Nugraha, Aniruddha Basu, Thomas D. Anthopoulos, Nicola Gasparini, Martin Heeney
Summary: This study reports three novel n-type conjugated polymer semiconductors incorporating carborane in the polymer backbone and demonstrates their applicability in optoelectronic devices. The optoelectronic properties of para-, meta-, and ortho-carborane isomers were compared and similar energetic characteristics were found between the different polymers. The carborane unit in the polymer acts as a conjugation breaker, confining electron delocalisation to the conjugated moieties. Fabrication of all-polymer organic photovoltaic (OPV) devices and thin-film transistors (TFTs) showed differences in device performance, with the meta-carborane based polymer exhibiting superior performance in both OPV and TFT devices.
Article
Chemistry, Multidisciplinary
Tongle Xu, Jie Lv, Ke Yang, Ya He, Qianguang Yang, Haiyan Chen, Qianqian Chen, Zhihui Liao, Zhipeng Kan, Tainan Duan, Kuan Sun, Jianyong Ouyang, Shirong Lu
Summary: The study investigates the effect of selenophene substitution on the morphology and photovoltaic performance of liquid crystalline donors, and finds that the selenide donor exhibits higher intramolecular interaction and a more favored morphology, leading to outstanding power conversion efficiency up to 15.8%. This highlights the superiority of selenophene in constructing efficient small molecule liquid crystalline donors.
ENERGY & ENVIRONMENTAL SCIENCE
(2021)
Article
Engineering, Electrical & Electronic
Kwang-Heum Lee, Seung Hee Lee, Sang-Joon Cho, Chi-Sun Hwang, Sang-Hee Ko Park
Summary: The electrical performance of a VTFT is strongly affected by the properties of the back-channel region. Applying a thin layer of SiO2 on a damaged back-channel region improves subthreshold swing while advanced photolithography results in a smoother back-channel interface. VTFTs fabricated using high-resolution stepper photolithography exhibit higher linear and saturation mobility compared to those fabricated using a standard projection aligner.
MICROELECTRONIC ENGINEERING
(2022)
Article
Chemistry, Physical
Jin-Woo Lee, Nayoun Choi, Dongjun Kim, Tan Ngoc-Lan Phan, Hyunbum Kang, Taek-Soo Kim, Bumjoon J. Kim
Summary: By developing new naphthalene dimide-based polymer acceptors, we have achieved superior power conversion efficiency and mechanical robustness of all-polymer solar cells compared to devices based on N2200. The enhanced charge generation and transport abilities of the new polymer acceptors contribute to the improved performance, with high electron mobility and optimal domain size and purity. Furthermore, the blend of PBDB-T:PNDIHD/DT-0.41 exhibits excellent mechanical robustness, with a high initial power conversion efficiency maintained even after bending 1500 times.
CHEMISTRY OF MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Ryo Miyata, Satoru Inoue, Ken Nakajima, Tatsuo Hasegawa
Summary: A practical method to produce high-performance organic thin-film transistors (OTFTs) was developed using highly layered crystalline organic semiconductors (OSCs). The choice of insulating polymer blend technique strongly affected the performance of the polycrystalline TFTs, with poly(methyl methacrylate) (PMMA) blend TFTs exhibiting high mobility exceeding 4 cm(2)/(V s) and small device-to-device variations. Findings from atomic force microscopy (AFM) techniques shed light on the thin-film morphologies and carrier transport properties, enabling the formation of uniform TFT performance.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Applied
Weipeng Sun, Junwei Wang, Yongqiang Shi, Ziang Wu, Yumin Tang, Kui Feng, Han Young Woo, Xugang Guo, Fei-Bao Zhang
Summary: A series of random terpolymer acceptors with A(1)-A(2)-A(3) backbone were synthesized using random copolymerization strategy, among which PBTP showed good performance and achieved high power conversion efficiency in all-polymer solar cells. This suggests that A(1)-A(2)-A(3) type terpolymer acceptors have potential for developing high-performance all-polymer solar cells.
Article
Materials Science, Multidisciplinary
Xiaotong Li, Xiaoping Zou, Chunqian Zhang, Jin Cheng, Guangdong Li, Yifei Wang, Xiaolan Wang, Keke Song, Baokai Ren, Junming Li
Summary: The study identifies HDA-BiI5 as an N-type semiconductor with high light absorption capabilities suitable for solar cell applications. Using SnO2 as an electron transport layer instead of TiO2 in previous researches results in higher carrier mobility. The dilution ratio of SnO2 solution influences the morphology and photophysical properties of HDA-BiI5 films, with the best photovoltaic performance achieved at a ratio of 3:8.
Article
Chemistry, Physical
Jinseck Kim, Geon-U Kim, Dong Jun Kim, Seungjin Lee, Dahyun Jeong, Soodeok Seo, Seo-Jin Ko, Sung Cheol Yoon, Taek-Soo Kim, Bumjoon J. Kim
Summary: In this study, a series of PM6-based terpolymers (PM6-BX) were developed by introducing a bulky electro-active third component to reduce the molecular packing tightness and improve the mechanical ductility of organic solar cells (OSCs). The neat PM6-B10 film with 10 mol% BID exhibited significantly improved mechanical ductility compared to neat PM6 film without BID. Additionally, the blend film of PM6-B10 and a small molecule acceptor showed higher power conversion efficiency and mechanical stretchability than the PM6 counterpart. This study provides important guidelines for the design of efficient P(D)s for high-performance, stretchable OSCs.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
