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POLYMER-TEMPLATED NUCLEATION AND CRYSTAL GROWTH OF PEROVSKITE FILM AND CONDUCTIVE IONOMER DOPED PEROVSKITE FILLM FOR HIGH PERFORMANCE OF ORGANIC-INORGANIC HYBRID PEROVSKITE SOLAR CELLS

FU, QIANG, FU
http://rave.ohiolink.edu/etdc/view?acc_num=akron1495207539153854

Abstract Details

2017, Master of Science in Polymer Engineering, University of Akron, Polymer Engineering.
Photovoltaic technologies are being developed for large-scale solar energy conversion in recent several years. The wafer-based first generation photovoltaic devices have been followed by thin-film solid semiconductor absorber layers sandwiched between two charge-selective transfer layers and nanostructured solar cells that rely on a distributed heterojunction to generate charge and to transport positive and negative charges in spatially separated phases. Although many materials have been used in nanostructured devices, the goal of attaining high-efficiency thin film solar cells in such a way has yet to be achieved. Organic-inorganic hybrid perovskite solar cells (PSCs) have been developed quickly in recent years quickly due to its easy fabrication procedures and high efficiency. Due to the high charge carrier mobility, large light extinction coefficient, direct band gap nature, the MAPbI3 perovskite shows a brilliant prospect as a light absorber and free charge carriers can be easily photo-generated within the MAPbI3 perovskite layer. To sufficiently extract the electrons from the perovskite light absorber to the electrodes, increasing the crystal size is necessary not only to help charge extraction, but also be responsible for proper surface modification and charge carrier recombination reduction. However, the crystallization of the perovskite will create the risk of forming unwanted defects, like the pinholes and grain boundaries. At the same time, conventional perovskite solar cells are limited by the application because of the higher hysteresis phenomenon and lower charge carrier mobility. In this thesis, we address the charge carrier recombination and hysteresis issues in chapter ¿ by applying lithium sulfonated polystyrene (LiSPS) ionomer in the perovskite film. Finally, the enhanced open circuit voltage (VOC) and short circuit current (JSC) have been achieved because of the modified defects by Li+ and higher charge carrier mobility. The power conversion efficiency (PCE) has improved around 12%. To further address crystallization issue for PSCs, we use poly electrolyte as the crystal template reported in chapter ¿. Consequently, enhanced crystal size and PCE have been achieved. In Chapter ¿, we further dope the PbI2 solution by using Poly (ethylene glycol) diacrylate (PEGDA) to solve the crystallization issue. The improved performance could be explained by the interaction between the C=O with PbI2. Perovskite films with higher electronic quality by using PEGDA as a template to control nucleation and crystal growth is obtained. We obtain shiny smooth perovskite films of excellent electronic quality, as manifested by a remarkably larger crystal size and higher short circuit current (JSC). We realize stable PSCs with excellent reproducibility showing a power conversion efficiency (PCE) of up to 15.60% under standard AM 1.5G reporting conditions. This demonstrates that perovskite absorbers can function at the highest efficiencies in simplified device architectures.
Xiong Gong (Advisor)
Thein Kyu (Committee Chair)
Zhenmeng Peng (Committee Member)
90 p.
Polymers

Recommended Citations

Citations

  • FU, FU, Q. (2017). POLYMER-TEMPLATED NUCLEATION AND CRYSTAL GROWTH OF PEROVSKITE FILM AND CONDUCTIVE IONOMER DOPED PEROVSKITE FILLM FOR HIGH PERFORMANCE OF ORGANIC-INORGANIC HYBRID PEROVSKITE SOLAR CELLS [Master's thesis, University of Akron]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=akron1495207539153854

    APA Style (7th edition)

  • FU, FU, QIANG. POLYMER-TEMPLATED NUCLEATION AND CRYSTAL GROWTH OF PEROVSKITE FILM AND CONDUCTIVE IONOMER DOPED PEROVSKITE FILLM FOR HIGH PERFORMANCE OF ORGANIC-INORGANIC HYBRID PEROVSKITE SOLAR CELLS. 2017. University of Akron, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=akron1495207539153854.

    MLA Style (8th edition)

  • FU, FU, QIANG. "POLYMER-TEMPLATED NUCLEATION AND CRYSTAL GROWTH OF PEROVSKITE FILM AND CONDUCTIVE IONOMER DOPED PEROVSKITE FILLM FOR HIGH PERFORMANCE OF ORGANIC-INORGANIC HYBRID PEROVSKITE SOLAR CELLS." Master's thesis, University of Akron, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=akron1495207539153854

    Chicago Manual of Style (17th edition)

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This open access ETD is published by University of Akron and OhioLINK.