Sökning: (WFRF:(Banerjee Amitava)) > (2018) > Simultaneous enhanc...
Fältnamn | Indikatorer | Metadata |
---|---|---|
000 | 05152naa a2200493 4500 | |
001 | oai:DiVA.org:kth-235878 | |
003 | SwePub | |
008 | 181009s2018 | |||||||||||000 ||eng| | |
009 | oai:DiVA.org:uu-366730 | |
024 | 7 | a https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-2358782 URI |
024 | 7 | a https://doi.org/10.1039/c8ta05491f2 DOI |
024 | 7 | a https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-3667302 URI |
040 | a (SwePub)kthd (SwePub)uu | |
041 | a engb eng | |
042 | 9 SwePub | |
072 | 7 | a ref2 swepub-contenttype |
072 | 7 | a art2 swepub-publicationtype |
100 | 1 | a Zhao, Xinu Nanyang Technol Univ, Sch Mat Sci & Engn, 50 Nanyang Ave, Singapore 639798, Singapore.4 aut |
245 | 1 0 | a Simultaneous enhancement in charge separation and onset potential for water oxidation in a BiVO4 photoanode by W-Ti codoping |
264 | c 2018 | |
264 | 1 | b Royal Society of Chemistry,c 2018 |
338 | a print2 rdacarrier | |
500 | a QC 20181009QC 20181017 | |
520 | a Efficient charge separation of photo-generated electrons and holes is critical to achieve high solar to hydrogen conversion efficiency in photoelectrochemical (PEC) water splitting. N-type doping is generally used to improve the conductivity by increasing the majority carrier density and enhance the charge separation in the photoanode. However, minority carrier transport is also very important in the process of charge separation, especially in materials that possess inadequate minority carrier mobility. Herein, we take a BiVO4 PEC water splitting cell as an example to demonstrate how to analyze the limiting factor and to formulate the corresponding solutions to improve the hole mobility. The benefits and problems caused by n-type doping (W-doping here) of BiVO4 are analyzed. Codoping with Ti further enhances the charge separation by improving the hole transport and leads to a cathodic shift of the photocurrent onset potential. A high charge separation efficiency (79% at 1.23 V-RHE) in a compact BiVO4 photoanode has been achieved without any nanostructure formation. Theoretical results show that W-Ti codoping has decreased the hole polaron hopping activation energy by 11.5% compared with mono-W doping, and this has resulted in a hole mobility increase by 29%. The calculated adsorption energy and reaction Gibbs free energies indicate that the Ti site is energetically more favorable for water splitting. Moreover, the Ti site possesses a lower overpotential in the W-Ti codoped sample compared with the mono-W doped sample. The current study indicates that in order to improve the solar energy conversion efficiency, there should be a balanced charge transport of both majority and minority charge carriers. This can be achieved by simply choosing appropriate codoping elements. | |
650 | 7 | a NATURVETENSKAPx Kemix Materialkemi0 (SwePub)104032 hsv//swe |
650 | 7 | a NATURAL SCIENCESx Chemical Sciencesx Materials Chemistry0 (SwePub)104032 hsv//eng |
650 | 7 | a NATURVETENSKAPx Kemix Fysikalisk kemi0 (SwePub)104022 hsv//swe |
650 | 7 | a NATURAL SCIENCESx Chemical Sciencesx Physical Chemistry0 (SwePub)104022 hsv//eng |
700 | 1 | a Hu, Junu Nanyang Technol Univ, Sch Mat Sci & Engn, 50 Nanyang Ave, Singapore 639798, Singapore.;Northwest Univ, Sch Chem Engn, Xian 710069, Shaanxi, Peoples R China.4 aut |
700 | 1 | a Wu, Bou Nanyang Technol Univ, Sch Phys & Math Sci, Singapore 637371, Singapore.4 aut |
700 | 1 | a Banerjee, Amitavau Uppsala universitet,Materialteori4 aut0 (Swepub:uu)amiba787 |
700 | 1 | a Chakraborty, Sudipu Uppsala universitet,Materialteori4 aut0 (Swepub:uu)sudch599 |
700 | 1 | a Feng, Jianyongu Nanyang Technol Univ, Sch Mat Sci & Engn, 50 Nanyang Ave, Singapore 639798, Singapore.4 aut |
700 | 1 | a Zhao, Zongyanu Kunming Univ Sci & Technol, Fac Mat Sci & Engn, Kunming 650093, Yunnan, Peoples R China.4 aut |
700 | 1 | a Chen, Shiu Nanyang Technol Univ, Sch Phys & Math Sci, Singapore 637371, Singapore.4 aut |
700 | 1 | a Ahuja, Rajeevu Uppsala universitet,KTH,Tillämpad materialfysik,Uppsala Univ, Mat Theory Div, Dept Phys & Astron, S-75120 Uppsala, Sweden,Materialteori4 aut0 (Swepub:uu)rajeeva |
700 | 1 | a Sum, Tze Chienu Nanyang Technol Univ, Sch Phys & Math Sci, Singapore 637371, Singapore.4 aut |
700 | 1 | a Chen, Zhongu Nanyang Technol Univ, Sch Mat Sci & Engn, 50 Nanyang Ave, Singapore 639798, Singapore.4 aut |
710 | 2 | a Nanyang Technol Univ, Sch Mat Sci & Engn, 50 Nanyang Ave, Singapore 639798, Singapore.b Nanyang Technol Univ, Sch Mat Sci & Engn, 50 Nanyang Ave, Singapore 639798, Singapore.;Northwest Univ, Sch Chem Engn, Xian 710069, Shaanxi, Peoples R China.4 org |
773 | 0 | t Journal of Materials Chemistry Ad : Royal Society of Chemistryg 6:35, s. 16965-16974q 6:35<16965-16974x 2050-7488x 2050-7496 |
856 | 4 | u https://dr.ntu.edu.sg/bitstream/10356/81164/1/Simultaneous%20enhancement%20in%20charge%20separation%20and%20onset%20potential%20for%20water%20oxidation.pdf |
856 | 4 8 | u https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-235878 |
856 | 4 8 | u https://doi.org/10.1039/c8ta05491f |
856 | 4 8 | u https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-366730 |
Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.