%0 Journal Article %1 kim2018improving %A Kim, Hong Il %A Kim, Myeong‐Jong %A Choi, Kyoungwon %A Lim, Chaesung %A Kim, Yun‐Hi %A Kwon, Soon‐Ki %A Park, Taiho %D 2018 %I Wiley Online Library %J Advanced Energy Materials %K AFM ETL SEM X-ray_spectroscopy impedance_spectroscopy new_material perovskite stability %N 16 %R 10.1002/aenm.201702872 %T Improving the Performance and Stability of Inverted Planar Flexible Perovskite Solar Cells Employing a Novel NDI‐Based Polymer as the Electron Transport Layer %U https://doi.org/10.1002/aenm.201702872 %V 8 %X A new naphthalene diimide (NDI)‐based polymer with strong electron withdrawing dicyanothiophene (P(NDI2DT‐TTCN)) is developed as the electron transport layer (ETL) in place of the fullerene‐based ETL in inverted perovskite solar cells (Pero‐SCs). A combination of characterization techniques, including atomic force microscopy, scanning electron microscopy, grazing‐incidence wide‐angle X‐ray scattering, near‐edge X‐ray absorption fine‐structure spectroscopy, space‐charge‐limited current, electrochemical impedance spectroscopy, photoluminescence (PL), and time‐resolved PL decay, is used to demonstrate the interface phenomena between perovskite and P(NDI2DT‐TTCN) or 6,6‐phenyl‐C61‐butyric acid methyl ester (PCBM). It is found that P(NDI2DT‐TTCN) not only improves the electron extraction ability but also prevents ambient condition interference by forming a hydrophobic ETL surface. In addition, P(NDI2DT‐TTCN) has excellent mechanical stability compared to PCBM in flexible Pero‐SCs. With these improved functionalities, the performance of devices based on P(NDI2DT‐TTCN) significantly outperform those based on PCBM from 14.3 to 17.0%, which is the highest photovoltaic performance with negligible hysteresis in the field of polymeric ETLs. A novel naphthalene diimide (NDI)‐based polymer (P(NDI2DT‐TTCN)) is used as the electron transport layer in inverted flexible perovskite solar cells. Photovoltaic performances of the P(NDI2DT‐TTCN)‐based device show a significant improvement up to 17.0%, whereas the control device for 6,6‐phenyl‐C61‐butyric acid methyl ester based device only shows power conversion efficiency of 14.3%. In addition, P(NDI2DT‐TTCN) improves not only the light‐induced and long‐term stability but also mechanical stability.

@article{kim2018improving, abstract = {A new naphthalene diimide (NDI)‐based polymer with strong electron withdrawing dicyanothiophene (P(NDI2DT‐TTCN)) is developed as the electron transport layer (ETL) in place of the fullerene‐based ETL in inverted perovskite solar cells (Pero‐SCs). A combination of characterization techniques, including atomic force microscopy, scanning electron microscopy, grazing‐incidence wide‐angle X‐ray scattering, near‐edge X‐ray absorption fine‐structure spectroscopy, space‐charge‐limited current, electrochemical impedance spectroscopy, photoluminescence (PL), and time‐resolved PL decay, is used to demonstrate the interface phenomena between perovskite and P(NDI2DT‐TTCN) or [6,6]‐phenyl‐C61‐butyric acid methyl ester (PCBM). It is found that P(NDI2DT‐TTCN) not only improves the electron extraction ability but also prevents ambient condition interference by forming a hydrophobic ETL surface. In addition, P(NDI2DT‐TTCN) has excellent mechanical stability compared to PCBM in flexible Pero‐SCs. With these improved functionalities, the performance of devices based on P(NDI2DT‐TTCN) significantly outperform those based on PCBM from 14.3 to 17.0%, which is the highest photovoltaic performance with negligible hysteresis in the field of polymeric ETLs. A novel naphthalene diimide (NDI)‐based polymer (P(NDI2DT‐TTCN)) is used as the electron transport layer in inverted flexible perovskite solar cells. Photovoltaic performances of the P(NDI2DT‐TTCN)‐based device show a significant improvement up to 17.0%, whereas the control device for [6,6]‐phenyl‐C61‐butyric acid methyl ester based device only shows power conversion efficiency of 14.3%. In addition, P(NDI2DT‐TTCN) improves not only the light‐induced and long‐term stability but also mechanical stability.}, added-at = {2018-07-04T11:45:00.000+0200}, author = {Kim, Hong Il and Kim, Myeong‐Jong and Choi, Kyoungwon and Lim, Chaesung and Kim, Yun‐Hi and Kwon, Soon‐Ki and Park, Taiho}, biburl = {https://www.bibsonomy.org/bibtex/2f1d6c104e94251b654a6fd21fb21e697/bretschneider_m}, doi = {10.1002/aenm.201702872}, interhash = {d3ce54c9b27a19048eea8b144082e8f3}, intrahash = {f1d6c104e94251b654a6fd21fb21e697}, issn = {1614-6832}, journal = {Advanced Energy Materials}, keywords = {AFM ETL SEM X-ray_spectroscopy impedance_spectroscopy new_material perovskite stability}, month = {6}, number = 16, publisher = {Wiley Online Library}, timestamp = {2018-07-04T11:45:00.000+0200}, title = {Improving the Performance and Stability of Inverted Planar Flexible Perovskite Solar Cells Employing a Novel NDI‐Based Polymer as the Electron Transport Layer}, url = {https://doi.org/10.1002/aenm.201702872}, volume = 8, year = 2018 }