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Your search keyword '"Baran, Derya"' showing total 26 results
Start Over Author "Baran, Derya" Language english Publisher american chemical society
26 results on '"Baran, Derya"'

5. Mechanical Reliability of Fullerene/Tin Oxide Interfaces in Monolithic Perovskite/Silicon Tandem Cells.

Author

De Bastiani, Michele, Armaroli, Giovanni, Jalmood, Rawan, Ferlauto, Laura, Xiaole Li, Tao, Ran, Harrison, George T., Eswaran, Mathan K., Azmi, Randi, Babics, Maxime, Subbiah, Anand S., Aydin, Erkan, Allen, Thomas G., Combe, Craig, Cramer, Tobias, Baran, Derya, Schwingenschlögl, Udo, Lubineau, Gilles, Cavalcoli, Daniela, and De Wolf, Stefaan

Published
2022
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9. Molecular Doping Directed by a Neutral Radical.

Author

Liu, Jian, Van der Zee, Bas, Villava, Diego R., Ye, Gang, Kahmann, Simon, Kamperman, Max, Dong, Jingjin, Qiu, Li, Portale, Giuseppe, Loi, Maria Antonietta, Hummelen, Jan C., Chiechi, Ryan C., Baran, Derya, and Koster, L. Jan Anton

Published
2021
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15. Enhancing the Charge Extraction and Stability of Perovskite Solar Cells Using Strontium Titanate (SrTiO3) Electron Transport Layer.

Author

Neophytou, Marios, De Bastiani, Michele, Gasparini, Nicola, Aydin, Erkan, Ugur, Esma, Seitkhan, Akmaral, Moruzzi, Floriana, Choaie, Yasmin, Ramadan, Alexandra J., Troughton, Joel R., Hallani, Rawad, Savva, Achilleas, Tsetseris, Leonidas, Inal, Sahika, Baran, Derya, Laquai, Frédéric, Anthopoulos, Thomas D., Snaith, Henry J., De Wolf, Stefaan, and McCulloch, Iain

Published
2019
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23. Qualitative Analysis of Bulk-Heterojunction Solar Cells without Device Fabrication: An Elegant and Contactless Method.

Author

Baran, Derya, Ning Li, Breton, Anne-Catherine, Osvet, Andres, Ameri, Tayebeh, Leclerc, Mario, and Brabec, Christoph J.

Subjects
*SOLAR cells, *HETEROJUNCTIONS, *PHOTOLUMINESCENCE, *ELECTROLUMINESCENCE, *PHOTOVOLTAIC power generation
Abstract

The enormous synthetic efforts on novel solar cell materials require a reliable and fast technique for the rapid screening of novel donor/acceptor combinations in order to quickly and reliably estimate their optimized parameters. Here, we report the applicability of such a versatile and fast evaluation technique for bulk heterojunction (BHJ) organic photovoltaics (OPV) by utilizing a steady-state photoluminescence (PL) method confirmed by electroluminescence (EL) measurements. A strong relation has been observed between the residual singlet emission and the charge transfer state emission in the blend. Using this relation, a figure of merit (FOM) is defined from photoluminescence and also electroluminescence measurements for qualitative analysis and shown to precisely anticipate the optimized blend parameters of bulk heterojunction films. Photoluminescence allows contactless evaluation of the photoactive layer and can be used to predict the optimized conditions for the best polymer–fullerene combination. Most interestingly, the contactless, PL-based FOM method has the potential to be integrated as a fast and reliable inline tool for quality control and material optimization. [ABSTRACT FROM AUTHOR]

Published
2014
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24. All-Solution-Processed Quantum Dot Electrical Double-Layer Transistors Enhanced by Surface Charges of Ti 3 C 2 T x MXene Contacts.

Author

Kim H, Nugraha MI, Guan X, Wang Z, Hota MK, Xu X, Wu T, Baran D, Anthopoulos TD, and Alshareef HN

Abstract

Fully solution-processed, large-area, electrical double-layer transistors (EDLTs) are presented by employing lead sulfide (PbS) colloidal quantum dots (CQDs) as active channels and Ti 3 C 2 T x MXene as electrical contacts (including gate, source, and drain). The MXene contacts are successfully patterned by standard photolithography and plasma-etch techniques and integrated with CQD films. The large surface area of CQD film channels is effectively gated by ionic gel, resulting in high performance EDLT devices. A large electron saturation mobility of 3.32 cm 2 V -1 s -1 and current modulation of 1.87 × 10 4 operating at low driving gate voltage range of 1.25 V with negligible hysteresis are achieved. The relatively low work function of Ti 3 C 2 T x MXene (4.42 eV) compared to vacuum-evaporated noble metals such as Au and Pt makes them a suitable contact material for n -type transport in iodide-capped PbS CQD films with a LUMO level of ∼4.14 eV. Moreover, we demonstrate that the negative surface charges of MXene enhance the accumulation of cations at lower gate bias, achieving a threshold voltage as low as 0.36 V. The current results suggest a promising potential of MXene electrical contacts by exploiting their negative surface charges.

Published
2021
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25. Fully solution-processing route toward highly transparent polymer solar cells.

Author

Guo F, Kubis P, Stubhan T, Li N, Baran D, Przybilla T, Spiecker E, Forberich K, and Brabec CJ

Abstract

We report highly transparent polymer solar cells using metallic silver nanowires (AgNWs) as both the electron- and hole-collecting electrodes. The entire stack of the devices is processed from solution using a doctor blading technique. A thin layer of zinc oxide nanoparticles is introduced between photoactive layer and top AgNW electrode which plays decisive roles in device functionality: it serves as a mechanical foundation which allows the solution-deposition of top AgNWs, and more importantly it facilitates charge carriers extraction due to the better energy level alignment and the formation of ohmic contacts between the active layer/ZnO and ZnO/AgNWs. The resulting semitransparent polymer:fullerene solar cells showed a power conversion efficiency of 2.9%, which is 72% of the efficiency of an opaque reference device. Moreover, an average transmittance of 41% in the wavelength range of 400-800 nm is achieved, which is of particular interest for applications in transparent architectures.

Published
2014
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26. Two similar near-infrared (IR) absorbing benzannulated aza-BODIPY dyes as near-IR sensitizers for ternary solar cells.

Author

Min J, Ameri T, Gresser R, Lorenz-Rothe M, Baran D, Troeger A, Sgobba V, Leo K, Riede M, Guldi DM, and Brabec CJ

Abstract

Ternary composite inverted organic solar cells based on poly(3-hexylthiophen-2,5-diyl) (P3HT) and phenyl-C61-butyric acid methyl ester (PCBM) blended with two different near-infrared absorbing benzannulated aza-BODIPY dyes, difluoro-bora-bis-(1-phenyl-indoyl)-azamethine (1) or difluoro-bora-bis-(1-(5-methylthiophen)-indoyl)-azamethine (2), were constructed and characterized. The amount of these two aza-BODIPY dyes, within the P3HT and PCBM matrix, was systematically varied, and the characteristics of the respective devices were recorded. Although the addition of both aza-BODIPY dyes enhanced the absorption of the blends, only the addition of 1 improved the overall power conversion efficiency (PCE) in the near-infrared (IR) region. The present work paves the way for the integration of near-infrared absorbing aza-BODIPY derivatives as sensitizers in ternary composite solar cells.

Published
2013
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