skip to main content

Search for: All records

Creators/Authors contains: "Jedlicka, Erin"

Note: When clicking on a Digital Object Identifier (DOI) number, you will be taken to an external site maintained by the publisher. Some full text articles may not yet be available without a charge during the embargo (administrative interval).
What is a DOI Number?

Some links on this page may take you to non-federal websites. Their policies may differ from this site.

  1. null (Ed.)
  2. Abstract

    The large open‐circuit voltage deficit (Voc,def) is the key issue that limits kesterite (Cu2ZnSn(S,Se)4, [CZTSSe]) solar cell performance. Substitution of Cu+by larger ionic Ag+((Ag,Cu)2ZnSn(S,Se)4, [ACZTSSe]) is one strategy to reduce Cu–Zn disorder and improve kesteriteVoc. However, the so far reported ACZTSSe solar cell has not demonstrated lowerVoc,defthan the world record device, indicating that some intrinsic defect properties cannot be mitigated using current approaches. Here, incorporation of Ag into kesterite through a dimethyl sulfoxide (DMSO) solution that can facilitate direct phase transformation grain growth and produce a uniform and less defective kesterite absorber is reported. The same coordination chemistry of Ag+and Cu+in the DMSO solution results in the same reaction path of ACZTSSe to CZTSSe, resulting in significant suppression of CuZndefects, its defect cluster [2CuZn + SnZn], and deep level defect CuSn. A champion device with an efficiency of 12.5% (active area efficiency 13.5% without antireflection coating) and a record lowVoc,def(64.2% Shockley–Queisser limit) is achieved from ACZTSSe with 5% Ag content.

    more » « less