http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Im, Jeong-Hyeok,Jang, In-Hyuk,Pellet, Norman,Grä,tzel, Michael,Park, Nam-Gyu Nature Publishing Group, a division of Macmillan P 2014 Nature nanotechnology Vol.9 No.11
Perovskite solar cells with submicrometre-thick CH<SUB>3</SUB>NH<SUB>3</SUB>PbI<SUB>3</SUB> or CH<SUB>3</SUB>NH<SUB>3</SUB>PbI<SUB>3–</SUB><SUB>x</SUB>Cl<SUB>x</SUB> active layers show a power conversion efficiency as high as 15%. However, compared to the best-performing device, the average efficiency was as low as 12%, with a large standard deviation (s.d.). Here, we report perovskite solar cells with an average efficiency exceeding 16% and best efficiency of 17%. This was enabled by the growth of CH<SUB>3</SUB>NH<SUB>3</SUB>PbI<SUB>3</SUB> cuboids with a controlled size via a two-step spin-coating procedure. Spin-coating of a solution of CH<SUB>3</SUB>NH<SUB>3</SUB>I with different concentrations follows the spin-coating of PbI<SUB>2</SUB>, and the cuboid size of CH<SUB>3</SUB>NH<SUB>3</SUB>PbI<SUB>3</SUB> is found to strongly depend on the concentration of CH<SUB>3</SUB>NH<SUB>3</SUB>I. Light-harvesting efficiency and charge-carrier extraction are significantly affected by the cuboid size. Under simulated one-sun illumination, average efficiencies of 16.4% (s.d. ± 0.35), 16.3% (s.d. ± 0.44) and 13.5% (s.d. ± 0.34) are obtained from solutions of CH<SUB>3</SUB>NH<SUB>3</SUB>I with concentrations of 0.038 M, 0.050 M and 0.063 M, respectively. By controlling the size of the cuboids of CH<SUB>3</SUB>NH<SUB>3</SUB>PbI<SUB>3</SUB> during their growth, we achieved the best efficiency of 17.01% with a photocurrent density of 21.64 mA cm<SUP>–2</SUP>, open-circuit photovoltage of 1.056 V and fill factor of 0.741.
Qin, Peng,Paek, Sanghyun,Dar, M. Ibrahim,Pellet, Norman,Ko, Jaejung,Grä,tzel, Michael,Nazeeruddin, Mohammad Khaja American Chemical Society 2014 JOURNAL OF THE AMERICAN CHEMICAL SOCIETY - Vol.136 No.24
<P>A low band gap quinolizino acridine based molecule was designed and synthesized as new hole transporting material for organic–inorganic hybrid lead halide perovskite solar cells. The functionalized quinolizino acridine compound showed an effective hole mobility in the same range of the state-of-the-art spiro-MeOTAD and an appropriate oxidation potential of 5.23 eV vs the vacuum level. The device based on this new hole transporting material achieved high power conversion efficiency of 12.8% under the illumination of 98.8 mW cm<SUP>–2</SUP>, which was better than the well-known spiro-MeOTAD under the same conditions. Moreover, this molecule could work alone without any additives, thus making it to be a promising candidate for solid-state photovoltaic application.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jacsat/2014/jacsat.2014.136.issue-24/ja503272q/production/images/medium/ja-2014-03272q_0006.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/ja503272q'>ACS Electronic Supporting Info</A></P>
Nanowire Perovskite Solar Cell
Im, Jeong-Hyeok,Luo, Jingshan,Franckevič,ius, Marius,Pellet, Norman,Gao, Peng,Moehl, Thomas,Zakeeruddin, Shaik Mohammed,Nazeeruddin, Mohammad Khaja,Grä,tzel, Michael,Park, Nam-Gyu American Chemical Society 2015 NANO LETTERS Vol.15 No.3
<P>Organolead iodide perovskite, CH<SUB>3</SUB>NH<SUB>3</SUB>PbI<SUB>3</SUB>, was prepared in the form of nanowire by means of a small quantity of aprotic solvent in two-step spin-coating procedure. One-dimensional nanowire perovskite with the mean diameter of 100 nm showed faster carrier separation in the presence of hole transporting layer and higher lateral conductivity than the three-dimensional nanocuboid crystal. Reduction in dimensionality resulted in the hypsochromic shift of both absorption and fluorescence spectra, indicative of more localized exciton states in nanowires. The best performing device employing nanowire CH<SUB>3</SUB>NH<SUB>3</SUB>PbI<SUB>3</SUB> delivered photocurrent density of 19.12 mA/cm<SUP>2</SUP>, voltage of 1.052 V, and fill factor of 0.721, leading to a power conversion efficiency (PCE) of 14.71% at standard AM 1.5G solar illumination. A small <I>I</I>–<I>V</I> hysteresis was observed, where a PCE at forward scan was measured to be 85% of the PCE at reverse scan.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/nalefd/2015/nalefd.2015.15.issue-3/acs.nanolett.5b00046/production/images/medium/nl-2015-00046q_0009.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/nl5b00046'>ACS Electronic Supporting Info</A></P>