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Solution-processed organic photovoltaics (OPVs) based on bulk-heterojunctions have gained significant attention to alleviate the increasing demend of fossil fuel in past two decades. OPVs combined of a wide bandgap polymer donor and a narrow bandgap non-fullerene acceptor show potential to achieve high performance. However, there are still two reasons to limit the OPVs performance. One, although this combination can expand from ultraviolet to near infrared region, the overall external quantum efficiency of device suffers low values. The other one is the low open-circuit voltage (VOC) of devices resulting from the relatively downshifted lowest unoccupied molecular orbital (LUMO) of the narrow bandgap. Herein, the approach to select and incorporate a versatile third component into the active layer is reported. A third component with bandgap larger than that of the acceptor, and absorption spectra and LUMO levels lying within that of the donor and acceptor is demonstrated to be effective conquer these issues. As a result, the power conversion efficiencies (PCEs) are enhanced by the elevated short-circuit current and VOC; the champion PCE are 11.1% and 13.1% for PTB7-Th:IEICO-4F based and PBDB-
Y1 based solar cells, respectively.
This article was published in the following journal.
Name: Nano letters
After presenting the basic theoretical models of excitation energy transfer and charge transfer, I describe some of the novel experimental methods used to probe them. Finally, I discuss recent results...
Recent efforts and progress in polymer solar cells have boosted the photovoltaic efficiency of the technology. This efficiency depends not only on the device architecture but also on the materials pro...
Transition metal dichalcogenides exhibit several different phases (e.g., semiconducting 2H, metallic 1T, 1T') arising from the collective and sluggish atomic displacements rooted in the charge-lattice...
The so-called Shockley-Queisser converting efficiency limit of Si solar cells is believed to be surpassed by using the spectral converter. However, searching for efficient spectral converting material...
The involvement of charge-transfer (CT) states in the photogeneration and recombination of charge carriers has been an important focus of study within the organic photovoltaic community. In this work,...
Design: Single center, prospective, randomized study that will compare activity levels in patients who complete cardiac rehabilitation after clinically indicated percutaneous coronary inte...
Improving physical activity is a core component of secondary prevention and cardiac (tele)rehabilitation. Commercially available activity trackers are frequently used to monitor and promot...
This phase II trial studies how well physical activity monitored by Fitbit Charge 2 works in improving quality of life in participants with ovarian, primary peritoneal, or fallopian tube c...
1. Clinical description of a French cohort of patients with CHARGE syndrome. 2. Search any phenotype-genotype correlation in typical, atypical or incomplete form of the syndrome ...
To investigate the effects of the availability of daily patient-related charges on ordering patterns of health care ordering providers and cost containment in the Intensive Care Unit (ICU)...
An atom or group of atoms that have a positive or negative electric charge due to a gain (negative charge) or loss (positive charge) of one or more electrons. Atoms with a positive charge are known as CATIONS; those with a negative charge are ANIONS.
Rare disease characterized by COLOBOMA; CHOANAL ATRESIA; and abnormal SEMICIRCULAR CANALS. Mutations in CHD7 protein resulting in disturbed neural crest development are associated with CHARGE Syndrome.
The transfer of energy of a given form among different scales of motion. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed). It includes the transfer of kinetic energy and the transfer of chemical energy. The transfer of chemical energy from one molecule to another depends on proximity of molecules so it is often used as in techniques to measure distance such as the use of FORSTER RESONANCE ENERGY TRANSFER.
The accumulation of an electric charge on a object
The ability of a substrate to retain an electrical charge.