Nanoscale control of grain boundary potential barrier, dopant density and filled trap state density for higher efficiency perovskite solar cells

被引：29

作者：

Bahrami, Behzad ^{[1
]}

Mabrouk, Sally ^{[1
]}

Adhikari, Nirmal ^{[1
]}

Elbohy, Hytham ^{[2
]}

Gurung, Ashim ^{[1
]}

Reza, Khan M. ^{[1
]}

Pathak, Rajesh ^{[1
]}

Chowdhury, Ashraful H. ^{[1
]}

Saianand, Gopalan ^{[3
]}

Yue, Wenjin ^{[4
]}

Zai, Jiantao ^{[5
]}

Qian, Xuefeng ^{[5
]}

Liang, Mao ^{[6
]}

Qiao, Qiquan ^{[1
]}

机构：

[1] South Dakota State Univ, Dept Elect Engn & Comp Sci, Ctr Adv Photovolta & Sustainable Energy, 1217 8th St, Brookings, SD 57006 USA

[2] Damietta Univ, Dept Phys, New Damietta, Egypt

[3] Univ Newcastle, Global Innovat Ctr Adv Nanomat, Fac Engn, Callaghan, NSW, Australia

[4] Anhui Polytech Univ, Coll Biochem Engn, Wuhu, Peoples R China

[5] Shanghai Jiao Tong Univ, Sch Chem & Chem Engn, Shanghai Electrochem Energy Devices Res Ctr, State Key Lab Met Matrix Composites, Dongchuan Rd, Shanghai 200240, Peoples R China

[6] Tianjin Univ Technol, Dept Appl Chem, Tianjin Key Lab Organ Solar Cells & Photochem Con, 391 Bingshui West Rd, Tianjin 300384, Peoples R China

来源：

INFOMAT | 2020年 / 2卷 / 02期

关键词：

dopant density; filled trap state density; grain boundary potential barrier; perovskite solar cells; relative humidity; PROBE FORCE MICROSCOPY; HIGH-PERFORMANCE; ANOMALOUS HYSTERESIS; TRANSPORT; POLYMER; PHOTOVOLTAICS; DEGRADATION; TEMPERATURE; MOISTURE; SURFACE;

D O I：

10.1002/inf2.12055

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this work, grain boundary (GB) potential barrier (Delta (GB)), dopant density (P-net), and filled trap state density (P-GB,P-trap) were manipulated at the nanoscale by exposing the fabricated perovskite films to various relative humidity (RH) environments. Spatial mapping of surface potential in the perovskite film revealed higher positive potential at GBs than inside the grains. The average Delta phi (GB), P-net, and P-GB,P-trap in the perovskite films decreased from 0% RH to 25% RH exposure, but increased when the RH increased to 35% RH and 45% RH. This clearly indicated that perovskite solar cells fabricated at 25% RH led to the lowest average GB potential, smallest dopant density, and least filled trap states density. This is consistent with the highest photovoltaic efficiency of 18.16% at 25% RH among the different relative humidities from 0% to 45% RH. image

引用

页码：409 / 423

页数：15

共 64 条

[61] Critical Role of Grain Boundaries for Ion Migration in Formamidinium and Methylammonium Lead Halide Perovskite Solar Cells [J].