--- _id: '645' abstract: - lang: eng text: PbS (lead sulfide) colloidal quantum dots consist of crystallites with diameters in the nanometer range with organic molecules on their surfaces, partly with additional metal complexes as ligands. These surface molecules are responsible for solubility and prevent aggregation, but the interface between semiconductor quantum dots and ligands also influences the electronic structure. PbS quantum dots are especially interesting for optoelectronic applications and spectroscopic techniques, including photoluminescence, photodiodes and solar cells. Here we concentrate on the latter, giving an overview of the optical properties of solar cells prepared with PbS colloidal quantum dots, produced by different methods and combined with diverse other materials, to reach high efficiencies and fill factors. article_number: '1743' article_type: review author: - first_name: Tomasz full_name: Blachowicz, Tomasz last_name: Blachowicz - first_name: Andrea full_name: Ehrmann, Andrea id: '223776' last_name: Ehrmann orcid: 0000-0003-0695-3905 citation: alphadin: 'Blachowicz, Tomasz ; Ehrmann, Andrea: Recent Developments of Solar Cells from PbS Colloidal Quantum Dots. In: Applied Sciences Bd. 10 (2020), Nr. 5' ama: Blachowicz T, Ehrmann A. Recent Developments of Solar Cells from PbS Colloidal Quantum Dots. Applied Sciences. 2020;10(5). doi:10.3390/app10051743 apa: Blachowicz, T., & Ehrmann, A. (2020). Recent Developments of Solar Cells from PbS Colloidal Quantum Dots. Applied Sciences, 10(5). https://doi.org/10.3390/app10051743 bibtex: '@article{Blachowicz_Ehrmann_2020, title={Recent Developments of Solar Cells from PbS Colloidal Quantum Dots}, volume={10}, DOI={10.3390/app10051743}, number={51743}, journal={Applied Sciences}, author={Blachowicz, Tomasz and Ehrmann, Andrea}, year={2020} }' chicago: Blachowicz, Tomasz, and Andrea Ehrmann. “Recent Developments of Solar Cells from PbS Colloidal Quantum Dots.” Applied Sciences 10, no. 5 (2020). https://doi.org/10.3390/app10051743. ieee: T. Blachowicz and A. Ehrmann, “Recent Developments of Solar Cells from PbS Colloidal Quantum Dots,” Applied Sciences, vol. 10, no. 5, 2020. mla: Blachowicz, Tomasz, and Andrea Ehrmann. “Recent Developments of Solar Cells from PbS Colloidal Quantum Dots.” Applied Sciences, vol. 10, no. 5, 1743, 2020, doi:10.3390/app10051743. short: T. Blachowicz, A. Ehrmann, Applied Sciences 10 (2020). date_created: 2021-01-03T14:54:32Z date_updated: 2021-05-25T08:37:30Z ddc: - '620' department: - _id: '103' doi: 10.3390/app10051743 file: - access_level: open_access content_type: application/pdf creator: aehrmann date_created: 2021-01-03T14:54:02Z date_updated: 2021-01-03T14:54:02Z file_id: '646' file_name: _2020_Blachowicz_ApplSci10_01743.pdf file_size: 1122094 relation: main_file success: 1 file_date_updated: 2021-01-03T14:54:02Z funded_apc: '1' has_accepted_license: '1' intvolume: ' 10' issue: '5' keyword: - colloidal PbS quantum dots - quantum dot solar cells - semiconductor - heterojunction - ligand - open-circuit voltage - short-circuit current - power conversion efficiency - fill factor language: - iso: eng oa: '1' publication: Applied Sciences publication_identifier: issn: - 2076-3417 publication_status: published quality_controlled: '1' status: public title: Recent Developments of Solar Cells from PbS Colloidal Quantum Dots type: journal_article user_id: '237837' volume: 10 year: '2020' ... --- _id: '637' abstract: - lang: eng text: Especially for the potential use as sensors, but also in all other applications in which an interaction with the environment occurs, nanofibrous materials are advantageous due to their large specific surface area. An interesting material for electrospinning is the semiconductor zinc oxide (ZnO) which is often used in photoelectric or sensory applications. Nanofibers containing ZnO can be produced, for example, by electrospinning polyvinylpyrrolidone/zinc nitrate from a dimethylformamide/ethanol solution, followed by calcination to remove the organic phase. Alternatively, the polymer/semiconductor blended nanofibers can be used which are often less brittle, but on the other hand offer less contact between ZnO and the environment. Finally, decorating a nanofiber mat with ZnO offers another possibility to prepare nanofibers with ZnO surface. Possible applications of electrospun ZnO nanofibers or nanofiber mats include gas sensing, microwave absorption, photocatalytic degradation or enhancement of supercapacitor electrodes. This short review gives an overview of the most recent electrospinning and after-treatment techniques to create pure and blended ZnO nanofibers and presents the broad variety of possible applications of this well-known semiconductor with some still surprising properties. article_number: '155892501989968' article_type: review author: - first_name: Tomasz full_name: Blachowicz, Tomasz last_name: Blachowicz - first_name: Andrea full_name: Ehrmann, Andrea last_name: Ehrmann date_created: 2021-01-03T14:44:06Z date_updated: 2021-01-18T15:32:28Z ddc: - '620' department: - _id: '103' doi: 10.1177/1558925019899682 file: - access_level: open_access content_type: application/pdf creator: aehrmann date_created: 2021-01-03T14:43:28Z date_updated: 2021-01-03T14:43:28Z file_id: '638' file_name: _2020_Blachowicz_JEFF15_1558925019899682.pdf file_size: 256248 relation: main_file success: 1 file_date_updated: 2021-01-03T14:43:28Z funded_apc: '1' has_accepted_license: '1' intvolume: ' 15' keyword: - Electrospinning - ZnO - nanofibers - semiconductor - supercapacitor - nanorods - nanosheets language: - iso: eng oa: '1' publication: Journal of Engineered Fibers and Fabrics publication_identifier: issn: - 1558-9250 - 1558-9250 publication_status: published quality_controlled: '1' status: public title: 'Recent developments in electrospun ZnO nanofibers: A short review' type: journal_article user_id: '223776' volume: 15 year: '2020' ... --- _id: '622' abstract: - lang: eng text: Developing dye-sensitized solar cells (DSSCs) further is of utmost importance in a time of increasing energy consumption and the necessity to change to renewable energy sources. Opposite to silicon-based solar cells, DSSCs can be produced from low-cost, non-toxic materials. In addition, they can be applied on flexible substrates, enabling even utilization on textile architecture. On the other hand, reaching efficiencies in a similar order of magnitude as with silicon-based solar cells is only possible by highly pure and toxic materials. This is why optimization of DSSCs with non-toxic and affordable materials is of high interest. Here we report on the possibility to increase the TiO2 layer performance by adding a nonionic surfactant, focusing on a non-toxic electrolyte and a natural dye. Our results show that coating the semiconducting layer from a solvent including a surfactant increases the efficiency of the DSSC. To enable comparison with results of other groups which are often reported for very small active areas, we compare three different areas between 0.25 cm² and 6.0 cm² and show that the efficiencies are more than doubled for the smallest active area in comparison to the largest one. This underlines the necessity to perform more research on large-area DSSCs, e.g. by combining several smaller cells, aiming at possible applications on tents or other large textile areas. article_number: '163945' article_type: original author: - first_name: Suphawit full_name: Udomrungkhajornchai, Suphawit last_name: Udomrungkhajornchai - first_name: Irén Juhász full_name: Junger, Irén Juhász last_name: Junger - first_name: Andrea full_name: Ehrmann, Andrea last_name: Ehrmann date_created: 2021-01-03T13:25:34Z date_updated: 2021-01-18T15:32:28Z department: - _id: '103' doi: 10.1016/j.ijleo.2019.163945 intvolume: ' 203' keyword: - Dye-sensitized solar cells (DSSCs) - Semiconductor - TiO2 - Nonionic surfactant - Triton X-100 - Natural dye - Anthocyanin - Active area language: - iso: eng publication: Optik publication_identifier: issn: - 0030-4026 publication_status: published quality_controlled: '1' status: public title: Optimization of the TiO2 layer in DSSCs by a nonionic surfactant type: journal_article user_id: '223776' volume: 203 year: '2019' ...