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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 CwtZC3NusNVpfVHaEk56L0dd0lraAist5DslTdMaHun687QRx3X3G4CRg0IQkeZ+
 xDrzsTk32sLqLYpo5aX6wA==

<SEC-DOCUMENT>0001179110-06-015131.txt : 20060713
<SEC-HEADER>0001179110-06-015131.hdr.sgml : 20060713
<ACCEPTANCE-DATETIME>20060713180547
ACCESSION NUMBER:		0001179110-06-015131
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20060711
FILED AS OF DATE:		20060713
DATE AS OF CHANGE:		20060713

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Foster Matthew
		CENTRAL INDEX KEY:			0001368034

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-32919
		FILM NUMBER:		06961358

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		3034201141

	MAIL ADDRESS:	
		STREET 1:		C/O ASCENT SOLAR TECHNOLOGIES, INC.
		STREET 2:		8120 SHAFFER PARKWAY
		CITY:			LITTLETON
		STATE:			CO
		ZIP:			80127

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Ascent Solar Technologies, Inc.
		CENTRAL INDEX KEY:			0001350102
		STANDARD INDUSTRIAL CLASSIFICATION:	SEMICONDUCTORS & RELATED DEVICES [3674]
		IRS NUMBER:				203672603
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		8120 SHAFFER PARKWAY
		CITY:			LITTLETON
		STATE:			CO
		ZIP:			80127
		BUSINESS PHONE:		303 420 1141

	MAIL ADDRESS:	
		STREET 1:		8120 SHAFFER PARKWAY
		CITY:			LITTLETON
		STATE:			CO
		ZIP:			80127
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>FORM 4 -
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2006-07-11</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001350102</issuerCik>
        <issuerName>Ascent Solar Technologies, Inc.</issuerName>
        <issuerTradingSymbol>ASTI</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001368034</rptOwnerCik>
            <rptOwnerName>Foster Matthew</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O ASCENT SOLAR TECHNOLOGIES, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>8120 SHAFFER PARKWAY</rptOwnerStreet2>
            <rptOwnerCity>LITTLETON</rptOwnerCity>
            <rptOwnerState>CO</rptOwnerState>
            <rptOwnerZipCode>80127</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>President and CEO</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Unit</value>
            </securityTitle>
            <transactionDate>
                <value>2006-07-11</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>215</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>5.50</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>72215</value>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">Each unit consists of one share of common stock, one Class A warrant and two Class B warrants.</footnote>
        <footnote id="F2">Mr. Foster holds 72,000 shares of common stock, and his wife holds 215 shares of common stock that are part of the units purchased.  Mr. Foster's wife also holds 215 Class A warrants and 430 Class B warrants that are part of the units purchased.  Mr. Foster also holds options to purchase 130,000 shares of common stock, as reported in his Form 3.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>David C. Wang, as attorney-in-fact for Matthew B. Foster</signatureName>
        <signatureDate>2006-07-13</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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