PDF(Pubmed)
Abstract：
The influence of n-octylammonium iodide (OAI, passive layer) on the types of phases formed in a (MACl)0.33FA0.99MA0.01Pb(I0.99Br0.01)3 perovskite film was studied using X-ray diffraction. Using UV spectrophotometric techniques, it was determined how varied OAI additive layer ratios affected the linear and nonlinear optical characteristics of glass substrates/FTO/compact TiO2/mesoporous TiO2/(MACl)0.33FA0.99MA0.01Pb(I0.99Br0.01)3 films. All films\' direct optical bandgap energies were determined to be 1.54 eV. The effects of OAI addition on the films\' photoluminescence intensity and emitted colors were also investigated. For the fabricated perovskite solar cells (PSCs) without an OAI passivation layer, the corresponding power conversion efficiency (PCE), open-circuit voltage (VOC), short-circuit current density (JSC), and fill factor (FF) values were 18.8%, 1.02 V, 24.6 mAcm-2, and 75%, respectively. When the concentration of OAI reached 2 mg, the maximum obtained values of PCE, VOC, JSC, and FF were 20.2%, 1.06 V, 24.2 mAcm-2, and 79%, respectively. The decreased trap density and increased recombination resistance were responsible for the improvement in solar cell performance.
摘要：
碘化正辛基铵(OAI，钝化层）使用X射线衍射研究了（MACl）0.33FA0.99MA0.01Pb（I0.99Br0.01）3钙钛矿薄膜中形成的相类型。使用紫外分光光度技术，确定了OAI添加剂层比率的变化如何影响玻璃基板/FTO/致密TiO2/介孔TiO2/（MACl）0.33FA0.99MA0.01Pb（I0.99Br0.01）3薄膜的线性和非线性光学特性。所有薄膜的直接光学带隙能量被确定为1.54eV。还研究了OAI添加对薄膜光致发光强度和发射颜色的影响。对于没有OAI钝化层的钙钛矿太阳能电池（PSC），相应的功率转换效率(PCE)，开路电压(VOC),短路电流密度（JSC），填充因子(FF)值为18.8%，1.02V,24.6mAcm-2和75%，分别。当OAI浓度达到2mg时，获得的最大PCE值，VOC,JSC,FF为20.2%，1.06V,24.2mAcm-2，79%，分别。降低的陷阱密度和增加的复合电阻是太阳能电池性能改善的原因。
