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11 Nov 12:34

Intercalation crystallization of phase-pure [small alpha]-HC(NH2)2PbI3 upon microstructurally engineered PbI2 thin films for planar perovskite solar cells

Nanoscale, 2016, 8,6265-6270
DOI: 10.1039/C5NR06189J, Communication
Yuanyuan Zhou, Mengjin Yang, Joonsuh Kwun, Onkar S. Game, Yixin Zhao, Shuping Pang, Nitin P. Padture, Kai Zhu
A microstructurally engineered PbI2 thin film with porosity and low crystallinity facilitates the formation of a phase-pure HC(NH2)2PbI3 perovskite thin film.
The content of this RSS Feed (c) The Royal Society of Chemistry
11 Nov 12:32

Comparison of the Impact of Zinc Vacancies on Charge Separation and Charge Transfer at ZnO/Sexithienyl and ZnO/Fullerene Interfaces

by Hong Li, Jean-Luc Bredas
Thumbnail image of graphical abstract

The impact of surface zinc vacancies on charge transfer and charge separation at donor/ZnO and acceptor/ZnO interfaces is identified via density functional theory calculations. The results show their effect to be related to the stronger internal electric field present near these vacancies. Thus, such surface defects can have a significant negative impact on the performance of hybrid solar cells using ZnO as electron acceptors.

11 Nov 12:29

Conjugated Polyelectrolyte Hybridized ZnO Nanoparticles as a Cathode Interfacial Layer for Efficient Polymer Light-Emitting Diodes

by Kyungmok Kim, Minwon Suh, Jihae Choi, Dongchan Lee, Youngsun Kim, Sang Hun Cheong, Donghyuk Kim, Duk Young Jeon

Alkoxy side-chain tethered polyfluorene conjugated polyelectrolyte (CPE), poly[(9,9-bis((8-(3-methyl-1-imidazolium)octyl)-2,7-fluorene)-alt-(9,9-bis(2-(2-methoxyethoxy)ethyl)-fluorene)] dibromide (F8imFO4), is utilized to obtain CPE-hybridized ZnO nanoparticles (NPs) (CPE:ZnO hybrid NPs). The surface defects of ZnO NPs are passivated through coordination interactions with the oxygen atoms of alkoxy side-chains and the bromide anions of ionic pendent groups from F8imFO4 to the oxygen vacancies of ZnO NPs, and thereby the fluorescence quenching at the interface of yellow-emitting poly(p-phenylene vinylene)/CPE:ZnO hybrid NPs is significantly reduced at the CPE concentration of 4.5 wt%. Yellow-emitting polymer light-emitting diodes (PLEDs) with CPE(4.5 wt%):ZnO hybrid NPs as a cathode interfacial layer show the highest device efficiencies of 11.7 cd A−1 at 5.2 V and 8.6 lm W−1 at 3.8 V compared to the ZnO NP only (4.8 cd A−1 at 7 V and 2.2 lm W−1 at 6.6 V) or CPE only (7.3 cd A−1 at 5.2 V and 4.9 lm W−1 at 4.2 V) devices. The results suggest here that the CPE:ZnO hybrid NPs has a great potential to improve the device performance of organic electronics.

Thumbnail image of graphical abstract

High-efficiency polymer light-emitting diodes (11.7 cd A−1 at 5.2 V and 8.6 lm W−1 at 3.8 V) are demonstrated using F8imFO4 conjugated polyelectrolyte (CPE)-hybridized zinc oxide nano­particles (ZnO NPs) as a cathode interfacial layer. The alkoxy sidechains and bromide anions of F8imFO4 form a coordination bond to the ZnO surface, thus reducing fluorescence quenching of light-emitting polymer.

08 Nov 05:23

Versatile ternary organic solar cells: a critical review

Energy Environ. Sci., 2015, Advance Article
DOI: 10.1039/C5EE02641E, Review Article
Qiaoshi An, Fujun Zhang, Jian Zhang, Weihua Tang, Zhenbo Deng, Bin Hu
Ternary organic solar cells enjoy both the enhanced light absorption by incorporating multiple organic materials in tandem solar cells and the simplicity of processing conditions that are used in single bulk heterojunction solar cells.
To cite this article before page numbers are assigned, use the DOI form of citation above.
The content of this RSS Feed (c) The Royal Society of Chemistry
08 Nov 05:23

Monolithic perovskite/silicon-heterojunction tandem solar cells processed at low temperature

Energy Environ. Sci., 2015, Advance Article
DOI: 10.1039/C5EE02965A, Communication
Steve Albrecht, Michael Saliba, Juan Pablo Correa Baena, Felix Lang, Lukas Kegelmann, Mathias Mews, Ludmilla Steier, Antonio Abate, Jorg Rappich, Lars Korte, Rutger Schlatmann, Mohammad Khaja Nazeeruddin, Anders Hagfeldt, Michael Gratzel, Bernd Rech
We present a monolithic perovskite/silicon tandem cell enabling a high Voc and a stabilized power output of 18%.
To cite this article before page numbers are assigned, use the DOI form of citation above.
The content of this RSS Feed (c) The Royal Society of Chemistry
08 Nov 05:20

Multiscale morphology design of hybrid halide perovskites through a polymeric template

Nanoscale, 2015, 7,18956-18963
DOI: 10.1039/C5NR04715C, Paper
Sofia Masi, Aurora Rizzo, Federica Aiello, Federica Balzano, Gloria Uccello-Barretta, Andrea Listorti, Giuseppe Gigli, Silvia Colella
The nature of the interactions between perovskite precursors and polymer templates allows the control of aggregates in solution whose characteristics are strictly maintained in the solid film.
The content of this RSS Feed (c) The Royal Society of Chemistry
08 Nov 05:19

Null current hysteresis for acetylacetonate electron extraction layer in perovskite solar cells

Nanoscale, 2015, Advance Article
DOI: 10.1039/C5NR06234A, Paper
Abd. Rashid bin Mohd Yusoff, Mohd Asri Mat Teridi, Jin Jang
Solution processed zirconium acetylacetonate (Zr(acac)) is successfully employed as an electron extraction layer, replacing conventional titanium oxide, in planar CH3NH3PbI3 perovskite solar cells.
To cite this article before page numbers are assigned, use the DOI form of citation above.
The content of this RSS Feed (c) The Royal Society of Chemistry
08 Nov 05:18

A dual-functional asymmetric squaraine-based low band gap hole transporting material for efficient perovskite solar cells

Nanoscale, 2015, Advance Article
DOI: 10.1039/C5NR05697G, Paper
Sanghyun Paek, Malik Abdul Rub, Hyeju Choi, Samia A. Kosa, Khalid A. Alamry, Jin Woo Cho, Peng Gao, Jaejung Ko, Abdullah M. Asiri, Mohammad Khaja Nazeeruddin
Asymmetric squaraine-based low band-gap hole transporting material acting as both light harvesting and hole transporting layers in perovskite solar cells.
To cite this article before page numbers are assigned, use the DOI form of citation above.
The content of this RSS Feed (c) The Royal Society of Chemistry
08 Nov 05:10

Intercalation Crystallization of Phase-Pure [small alpha]-HC(NH2)2PbI3 upon Microstructurally Engineered PbI2 Thin Films for Planar Perovskite Solar Cells

Nanoscale, 2015, Accepted Manuscript
DOI: 10.1039/C5NR06189J, Communication
Yuanyuan Zhou, Mengjin Yang, Joonsuh Kwun, Onkar Game, Yixin Zhao, Shuping Pang, Nitin P Padture, Kai Zhu
The microstructure of the solid-PbI2 precursor thin film plays an important role in the intercalation crystallization of formamidinium lead triiodide perovskite ([small alpha]-HC(NH2)2PbI3). It is shown that microstructurally engineered PbI2 thin...
The content of this RSS Feed (c) The Royal Society of Chemistry
08 Nov 05:06

Analysing the effect of crystal size and structure in highly efficient CH3NH3PbI3 perovskite solar cells by spatially resolved photo- and electroluminescence imaging

Nanoscale, 2015, 7,19653-19662
DOI: 10.1039/C5NR05308K, Paper
S. Mastroianni, F. D. Heinz, J.-H. Im, W. Veurman, M. Padilla, M. C. Schubert, U. Wurfel, M. Gratzel, N.-G. Park, A. Hinsch
The spatial and size distribution of perovskite crystals and their morphology strongly influences the PL emission and the performance of the solar cell.
The content of this RSS Feed (c) The Royal Society of Chemistry
08 Nov 05:02

Charge generation and morphology in P3HT : PCBM nanoparticles prepared by mini-emulsion and reprecipitation methods

Nanoscale, 2015, 7,19899-19904
DOI: 10.1039/C5NR06244F, Communication
Kyra N. Schwarz, Sam B. Farley, Trevor A. Smith, Kenneth P. Ghiggino
P3HT : PCBM nanoparticles exhibit charge generation and nanomorphology similar to unannealed and annealed blend films, depending on the preparation method.
The content of this RSS Feed (c) The Royal Society of Chemistry
08 Nov 05:01

Mesoscopic Perovskite Solar Cell with the Admixture of Nanocrystalline TiO2 and Al2O3: Role of Interconnectivity of TiO2 in Charge Collection

Nanoscale, 2015, Accepted Manuscript
DOI: 10.1039/C5NR05974G, Paper
Jae-Min Cha, Jin-Wook Lee, Dae-Yong Son, Hui-Seon Kim, In-Hyuk Jang, Nam-Gyu Park
Perovskite solar cell with high power conversion efficiency usually employs mesoporous TiO2, however the role of the TiO2 layer has not been clearly resolved. Here we prepared MAPbI3 (MA =...
The content of this RSS Feed (c) The Royal Society of Chemistry
07 Nov 07:53

Observation of a hot-phonon bottleneck in lead-iodide perovskites

by Ye Yang

Nature Photonics. doi:10.1038/nphoton.2015.213

Authors: Ye Yang, David P. Ostrowski, Ryan M. France, Kai Zhu, Jao van de Lagemaat, Joseph M. Luther & Matthew C. Beard

07 Nov 07:52

Determination of Thermal Expansion Coefficients and Locating the Temperature-Induced Phase Transition in Methylammonium Lead Perovskites Using X-ray Diffraction

by T. Jesper Jacobsson, L. Josef Schwan, Mikael Ottosson, Anders Hagfeldt and Tomas Edvinsson

TOC Graphic

Inorganic Chemistry
DOI: 10.1021/acs.inorgchem.5b01481
07 Nov 06:44

High-Performance Organic Solar Cells Based on a Small Molecule with Alkylthio-Thienyl-Conjugated Side Chains without Extra Treatments

by Chaohua Cui, Xia Guo, Jie Min, Bing Guo, Xiao Cheng, Maojie Zhang, Christoph J. Brabec, Yongfang Li
Thumbnail image of graphical abstract

A new 2D-conjugated small molecule with alkylthio-thienyl-conjugated side chains (BDTT-S-TR) is synthesized for application as a donor material in organic solar cells (OSCs). The OSCs based on BDTT-S-TR/PC70BM demonstrate a power conversion efficiency (PCE) of 9.20% without extra treatment. Moreover, an encouraging PCE of 6.68% is achieved from the device with active area of 144 mm2.

07 Nov 06:18

Wireless Solar Water Splitting Device with Robust Cobalt-Catalyzed, Dual-Doped BiVO4 Photoanode and Perovskite Solar Cell in Tandem: A Dual Absorber Artificial Leaf

by Jin Hyun Kim, Yimhyun Jo, Ju Hun Kim, Ji Wook Jang, Hyun Jun Kang, Young Hye Lee, Dong Suk Kim, Yongseok Jun and Jae Sung Lee

TOC Graphic

ACS Nano
DOI: 10.1021/acsnano.5b03859
07 Nov 04:12

Photo-generated carriers lose energy during extraction from polymer-fullerene solar cells

by Armantas Melianas

Article

Organic photovoltaics rely on the collection of charge carriers generated in disordered materials. Here, the authors unify various experimental techniques and simulations to show that these devices operate out-of-equilibrium, questioning the typical assumption of quasi-equilibrium.

Nature Communications doi: 10.1038/ncomms9778

Authors: Armantas Melianas, Fabian Etzold, Tom J. Savenije, Frédéric Laquai, Olle Inganäs, Martijn Kemerink

07 Nov 04:07

Stable ultrathin partially oxidized copper film electrode for highly efficient flexible solar cells

by Guoqing Zhao

Article

Light enters and exits optoelectronic devices through transparent conductive electrodes, which are one of their most expensive components. Here, the authors develop stable transparent conductive electrodes based on copper and oxide layers that lead to efficient flexible organic solar cells.

Nature Communications doi: 10.1038/ncomms9830

Authors: Guoqing Zhao, Wei Wang, Tae-Sung Bae, Sang-Geul Lee, ChaeWon Mun, Sunghun Lee, Huashun Yu, Gun-Hwan Lee, Myungkwan Song, Jungheum Yun

07 Nov 04:05

Spectral splitting photovoltaics using perovskite and wideband dye-sensitized solar cells

by Takumi Kinoshita

Article

Lead halide perovskite solar cells have a limited spectral response in the near infrared. Here, the authors present ruthenium dyes with extended near infrared absorbance and combine perovskite and dye-based solar cells by spectral splitting to obtain broadband, 21.5% efficient solar cells.

Nature Communications doi: 10.1038/ncomms9834

Authors: Takumi Kinoshita, Kazuteru Nonomura, Nam Joong Jeon, Fabrizio Giordano, Antonio Abate, Satoshi Uchida, Takaya Kubo, Sang Il Seok, Mohammad Khaja Nazeeruddin, Anders Hagfeldt, Michael Grätzel, Hiroshi Segawa

03 Nov 14:07

Transition from the Tetragonal to Cubic Phase of Organohalide Perovskite: The Role of Chlorine in Crystal Formation of CH3NH3PbI3 on TiO2 Substrates

by Qiong Wang, Miaoqiang Lyu, Meng Zhang, Jung-Ho Yun, Hongjun Chen and Lianzhou Wang

TOC Graphic

The Journal of Physical Chemistry Letters
DOI: 10.1021/acs.jpclett.5b01682
03 Nov 14:01

Dopants Control Electron–Hole Recombination at Perovskite–TiO2 Interfaces: Ab Initio Time-Domain Study

by Run Long and Oleg V. Prezhdo

TOC Graphic

ACS Nano
DOI: 10.1021/acsnano.5b05843
03 Nov 13:56

High-Performance Organolead Halide Perovskite-Based Self-Powered Triboelectric Photodetector

by Li Su, Zhen Xuan Zhao, Hua Yang Li, Jian Yuan, Zhong Lin Wang, Guo Zhong Cao and Guang Zhu

TOC Graphic

ACS Nano
DOI: 10.1021/acsnano.5b04995
03 Nov 03:29

Neutral-Color Semitransparent Organic Solar Cells with All-Graphene Electrodes

by Zhike Liu, Peng You, Shenghua Liu and Feng Yan

TOC Graphic

ACS Nano
DOI: 10.1021/acsnano.5b04858
03 Nov 03:29

Binary Crystallized Supramolecular Aerogels Derived from Host–Guest Inclusion Complexes

by Jin Wang and Xuetong Zhang

TOC Graphic

ACS Nano
DOI: 10.1021/acsnano.5b05281
03 Nov 03:13

Conductivity in organic semiconductors hybridized with the vacuum field

by E. Orgiu

Nature Materials 14, 1123 (2015). doi:10.1038/nmat4392

Authors: E. Orgiu, J. George, J. A. Hutchison, E. Devaux, J. F. Dayen, B. Doudin, F. Stellacci, C. Genet, J. Schachenmayer, C. Genes, G. Pupillo, P. Samorì & T. W. Ebbesen

03 Nov 03:07

Nanoscale transport of charge-transfer states in organic donor–acceptor blends

by P. B. Deotare

Nature Materials 14, 1130 (2015). doi:10.1038/nmat4424

Authors: P. B. Deotare, W. Chang, E. Hontz, D. N. Congreve, L. Shi, P. D. Reusswig, B. Modtland, M. E. Bahlke, C. K. Lee, A. P. Willard, V. Bulović, T. Van Voorhis & M. A. Baldo

03 Nov 02:55

Hybrid perovskites: Cationic vibrations

by Luigi Martiradonna

Nature Materials 14, 1075 (2015). doi:10.1038/nmat4469

Author: Luigi Martiradonna

03 Nov 02:53

A checklist for photovoltaic research

Nature Materials 14, 1073 (2015). doi:10.1038/nmat4473

To aid the reproducibility of published results for photovoltaic devices, from now on we will ask authors of relevant manuscripts to complete a checklist of key technical information that must be reported.

10 Oct 02:19

Highly Efficient Copper–Indium–Selenide Quantum Dot Solar Cells: Suppression of Carrier Recombination by Controlled ZnS Overlayers

by Jae-Yup Kim, Jiwoong Yang, Jung Ho Yu, Woonhyuk Baek, Chul-Ho Lee, Hae Jung Son, Taeghwan Hyeon and Min Jae Ko

TOC Graphic

ACS Nano
DOI: 10.1021/acsnano.5b04917
10 Oct 02:13

Flexible high power-per-weight perovskite solar cells with chromium oxide–metal contacts for improved stability in air

by Martin Kaltenbrunner

Nature Materials 14, 1032 (2015). doi:10.1038/nmat4388

Authors: Martin Kaltenbrunner, Getachew Adam, Eric Daniel Głowacki, Michael Drack, Reinhard Schwödiauer, Lucia Leonat, Dogukan Hazar Apaydin, Heiko Groiss, Markus Clark Scharber, Matthew Schuette White, Niyazi Serdar Sariciftci & Siegfried Bauer