A low molecular mass organogelator(LMOG),N,N’-1,5-pentanediylbis-dodecanamide, was applied to quasi-solid-state dye-sensitized solar cells(QS-DSSCs). The crosslinked gel network was self-assemblied by the LOMG in the...A low molecular mass organogelator(LMOG),N,N’-1,5-pentanediylbis-dodecanamide, was applied to quasi-solid-state dye-sensitized solar cells(QS-DSSCs). The crosslinked gel network was self-assemblied by the LOMG in the liquid electrolyte, and the in situ assembly process of gelator can be obtained by the polarized optical microscopy(POM). On one hand, the network hinders the diffusion of redox species and accelerates the electron recombination at the interface of the TiO_2 photoanode/electrolyte. On the other hand, Li+ can interact with the amide carbonyl groups of the gelators and the adsorption of Li+ onto the TiO_2 surface decreases, leading to a negative shift of the TiO_2 conduction band edge, accelerated electron transport and decreased electron injection efficiency(η_(inj)) of QS-DSSC. As a result, the incidental photon-to-electron conversion efficiency(IPCE),the short circuit photocurrent density(J_(sc)) and the open circuit voltage(V_(oc)) of the QS-DSSC are decreased compared with those of the liquid electrolyte based DSSC(L-DSSC),which indicates that the electron recombination plays a great role in the photovoltaic performances of DSSC. Remarkably,the QS-DSSC exhibits excellent thermal and light-soaking stabilities during accelerated aging tests for 1000 h, which is attributed to a great intrinsic stability of the gel electrolyte with a high gel to solution transition temperature(T_(gel)=108°C).展开更多
As a low-cost photovoltaic technology, dye- sensitized solar cell （DSSC） has attracted widespread attention in the past decade. During its development to commercial application, decreasing the production cost and in...As a low-cost photovoltaic technology, dye- sensitized solar cell （DSSC） has attracted widespread attention in the past decade. During its development to commercial application, decreasing the production cost and increasing the device stability take the most impor- tance. Compared with conventional sandwich structure liquid-state DSSCs, monolithic all-solid-state mesoscopic solar cells based on mesoscopic carbon counter electrodes and solid-state electrolytes present much lower production cost and provide a prospect of long-term stability. This review presents the recent progress of materials and achievement for all-solid-state DSSCs. In particular, representative examples are highlighted with the results of our monolithic all-solid-state mesoscopic solar cell devices and modules.展开更多
A new type quasi-solid state electrolyte was prepared by solidifying liquid electrolytes con- taining organic solvents (such as mixture of ethylene carbonate (EC) and propylene carbonate (PC), 3- methoxypropinitrile (...A new type quasi-solid state electrolyte was prepared by solidifying liquid electrolytes con- taining organic solvents (such as mixture of ethylene carbonate (EC) and propylene carbonate (PC), 3- methoxypropinitrile (NMP) and N-methyl-oxazolidin- one (NMO)) with comb-like molten salt type polymer, and was for the first time employed in dyesensitized solar cells (DSSCs). The optimal electrolyte compo- sition was obtained by regulating the polymer content in the electrolytes and optimizing performance data of the electrolytes and assembled cells, yielding a maximum conversion efficiency of 6.58% (AM 1.5, 100 mW·cm?2). Furthermore, the existence of this new type polymer in the electrolyte suppresses the evaporation of organic solvent and improves the sta- bility of the cells.展开更多
Different precursors were prepared via a simple low heat solid state reaction（LHSSR） upon changing the ligands. The ZnO photoanode films were obtained by the doctor blade technique, and their composition, thermal de...Different precursors were prepared via a simple low heat solid state reaction（LHSSR） upon changing the ligands. The ZnO photoanode films were obtained by the doctor blade technique, and their composition, thermal decomposition process and morphologies were identified by means of X-ray diffraction（XRD）, thermal gravimetric analysis-differential thermal analysis（TGA-SDTA） and scanning electron microscope（SEM）. The results show that the morphologies of ZnO photoanodes are irregular block, regular lamellar and irregular sheet-cluster, and the multistage structure can be found in all the photoanodes. Furthermore, there exists a genetic effect of morphology between the precursors and the corresponding photoanodes. The optimum power conversion efficiency of the sheet-cluster ZnO photoanode was 3.12% with the short circuit current density（dsc） being 11.23 mA/cm2. The multistage sheet-cluster structure could result in the increase of the scattering of the incident light and provide a rapid electronic transmission channel to reduce the risk of electronic recombination. A beneficial enlightenment was obtained to simplify the process and the photoanode films with various morphologies can be prepared with lower price in the further research.展开更多
基金supported by the National High Technology Research and Development Program of China(2015AA050602)the National Natural Science Foundation of China(21103197,21403247,61404142 and 21273242)+2 种基金the National Basic Research Programof China(2015CB932200)the project of Scientific and Technological Support Program in Jiangsu province(BE2014147-4)Beijing Municipal Science and Technology Project(Z141100003314003)
文摘A low molecular mass organogelator(LMOG),N,N’-1,5-pentanediylbis-dodecanamide, was applied to quasi-solid-state dye-sensitized solar cells(QS-DSSCs). The crosslinked gel network was self-assemblied by the LOMG in the liquid electrolyte, and the in situ assembly process of gelator can be obtained by the polarized optical microscopy(POM). On one hand, the network hinders the diffusion of redox species and accelerates the electron recombination at the interface of the TiO_2 photoanode/electrolyte. On the other hand, Li+ can interact with the amide carbonyl groups of the gelators and the adsorption of Li+ onto the TiO_2 surface decreases, leading to a negative shift of the TiO_2 conduction band edge, accelerated electron transport and decreased electron injection efficiency(η_(inj)) of QS-DSSC. As a result, the incidental photon-to-electron conversion efficiency(IPCE),the short circuit photocurrent density(J_(sc)) and the open circuit voltage(V_(oc)) of the QS-DSSC are decreased compared with those of the liquid electrolyte based DSSC(L-DSSC),which indicates that the electron recombination plays a great role in the photovoltaic performances of DSSC. Remarkably,the QS-DSSC exhibits excellent thermal and light-soaking stabilities during accelerated aging tests for 1000 h, which is attributed to a great intrinsic stability of the gel electrolyte with a high gel to solution transition temperature(T_(gel)=108°C).
基金Acknowledgements The authors acknowledge the financial support by the National High Technology Research and Development Program of China （863 Program, No. SS2013AA50303）, the National Natural Science Foundation of China （Grant No. 61106056） and Scientific Research Foundation for Returned Scholars, Ministry of Education of China.
文摘As a low-cost photovoltaic technology, dye- sensitized solar cell （DSSC） has attracted widespread attention in the past decade. During its development to commercial application, decreasing the production cost and increasing the device stability take the most impor- tance. Compared with conventional sandwich structure liquid-state DSSCs, monolithic all-solid-state mesoscopic solar cells based on mesoscopic carbon counter electrodes and solid-state electrolytes present much lower production cost and provide a prospect of long-term stability. This review presents the recent progress of materials and achievement for all-solid-state DSSCs. In particular, representative examples are highlighted with the results of our monolithic all-solid-state mesoscopic solar cell devices and modules.
基金supported by the State Key Basic Research and Development Program(Grant No.G2000028205)the High-Tech Research and Development Program of China(Grant No.2002AA302403)the National Natural Science Foundation of China(Grant Nos.50221201 and 50473055).
文摘A new type quasi-solid state electrolyte was prepared by solidifying liquid electrolytes con- taining organic solvents (such as mixture of ethylene carbonate (EC) and propylene carbonate (PC), 3- methoxypropinitrile (NMP) and N-methyl-oxazolidin- one (NMO)) with comb-like molten salt type polymer, and was for the first time employed in dyesensitized solar cells (DSSCs). The optimal electrolyte compo- sition was obtained by regulating the polymer content in the electrolytes and optimizing performance data of the electrolytes and assembled cells, yielding a maximum conversion efficiency of 6.58% (AM 1.5, 100 mW·cm?2). Furthermore, the existence of this new type polymer in the electrolyte suppresses the evaporation of organic solvent and improves the sta- bility of the cells.
文摘Different precursors were prepared via a simple low heat solid state reaction（LHSSR） upon changing the ligands. The ZnO photoanode films were obtained by the doctor blade technique, and their composition, thermal decomposition process and morphologies were identified by means of X-ray diffraction（XRD）, thermal gravimetric analysis-differential thermal analysis（TGA-SDTA） and scanning electron microscope（SEM）. The results show that the morphologies of ZnO photoanodes are irregular block, regular lamellar and irregular sheet-cluster, and the multistage structure can be found in all the photoanodes. Furthermore, there exists a genetic effect of morphology between the precursors and the corresponding photoanodes. The optimum power conversion efficiency of the sheet-cluster ZnO photoanode was 3.12% with the short circuit current density（dsc） being 11.23 mA/cm2. The multistage sheet-cluster structure could result in the increase of the scattering of the incident light and provide a rapid electronic transmission channel to reduce the risk of electronic recombination. A beneficial enlightenment was obtained to simplify the process and the photoanode films with various morphologies can be prepared with lower price in the further research.
